✅ C) She quickly ran to the store is an independent clause because it contains a subject ("She") and a verb ("ran") and expresses a complete thought that can stand alone as a sentence.

❌ A) After the storm finally passed is a dependent clause because it begins with the subordinating conjunction "After," preventing it from expressing a complete thought on its own.

❌ B) Because he loves to read science fiction is a dependent clause because it begins with the subordinating conjunction "Because," making it unable to stand alone as a complete sentence.

❌ D) If you want to join us for dinner is a dependent clause because it begins with the subordinating conjunction "If," indicating it depends on another clause for its full meaning.

✅ "The children played outside" is an independent clause because it contains a subject ("children") and a verb ("played") and expresses a complete thought that can stand alone as a sentence.

❌ "Although it was raining heavily" is a dependent clause because it begins with the subordinating conjunction "Although," making it unable to stand alone as a complete sentence.

❌ "until their parents called them in" is also a dependent clause, introduced by the subordinating conjunction "until," which means it cannot form a complete sentence on its own.

❌ "raining heavily" is a participial phrase, not a clause, as it lacks a subject-verb pair that expresses a complete thought.

✅ Option D, "The old house stood silent on the hill," is an independent clause because it contains a subject ("The old house") and a predicate ("stood silent on the hill") and expresses a complete thought, allowing it to stand alone as a full sentence.

❌ Option A includes the dependent clause "Because the train was delayed," which cannot stand alone as it begins with the subordinating conjunction "Because."

❌ Option B contains the dependent clause "While she waited for her coffee," which is introduced by the subordinating conjunction "While" and does not express a complete thought on its own.

❌ Option C features the dependent clause "Although he practiced diligently," which starts with the subordinating conjunction "Although" and relies on another clause for a complete meaning.

✅ "Although she was tired" is a dependent (or subordinate) clause because it contains a subject ("she") and a verb ("was tired"), but it begins with the subordinating conjunction "Although."

This conjunction prevents the clause from expressing a complete thought on its own, making it reliant on the independent clause ("Maria stayed up late to finish her project") for full meaning.

❌ An independent clause expresses a complete thought and can stand alone as a sentence; "Although she was tired" cannot.

❌ A noun phrase is a group of words that functions as a noun; this clause modifies the main verb and acts adverbially.

❌ A prepositional phrase begins with a preposition and typically ends with a noun or pronoun; this clause has a subject and a verb, which a phrase lacks.

✅ Option B contains the dependent clause "because her car broke down on the highway." This clause starts with the subordinating conjunction "because" and cannot stand alone as a complete sentence; it provides a reason for "She arrived late."

❌ Option A consists of two independent clauses joined by the coordinating conjunction "so." Both "The sun shone brightly" and "we went to the beach" are complete thoughts.

❌ Option C is a simple sentence with compound predicates ("enjoys reading novels and writing short stories") and does not contain a dependent clause.

❌ Option D contains a relative clause ("which was bustling with people") that modifies "market," but the question asks for a dependent clause that modifies the *main clause* (acting as an adverbial clause, providing reason, time, condition, etc.). While a relative clause is dependent, "because her car broke down" directly modifies the action of the main clause by explaining *why* she arrived late, making it the best fit for "modifies the main clause" in an adverbial sense.