✅ The original passive sentence "The new policy was approved by the board members" is in the past simple tense (was + past participle).

To convert a past simple passive sentence to active, the agent ("the board members") becomes the subject, and the verb should be in the past simple tense.

Therefore, "approved" is the correct past simple active verb form.

❌ Option A changes the tense to present simple.

❌ Option B changes the tense to future simple.

❌ Option D changes the tense to present perfect.

✅ The original passive sentence "The new budget will be reviewed by the finance team" is in the future simple tense (will be + past participle).

To convert it to an active voice, the agent ("the finance team") becomes the subject, and the verb must remain in the future simple tense (will + base form).

Therefore, "The finance team will review the new budget" is the correct active conversion.

❌ Option A changes the tense to past simple.

❌ Option C changes the tense to present continuous.

❌ Option D changes the tense to present perfect.

✅ The original sentence "The new novel was published by an independent press last month" is in the simple past passive tense (was/were + past participle).

To convert it to the active voice, the agent "an independent press" becomes the subject, and the verb form must remain in the simple past active tense (verb in past form).

Therefore, "An independent press published the new novel last month" correctly matches the tense and meaning.

❌ Option A ("publishes") uses the present simple, which changes the original tense.

❌ Option B ("will publish") uses the simple future, altering the original tense.

❌ Option D ("has published") uses the present perfect, which also changes the original tense.