✅ The argument observes a correlation (the program's introduction followed by a cost decrease) and then directly attributes causation without considering alternative explanations.

✅ Many other factors, such as changes in overall consumption patterns, fuel prices for waste transport, or labor costs, could also influence waste disposal expenses during the same period.

❌ Option A is incorrect because the argument cites a specific 15% decrease, which is presented as a piece of data, not merely an anecdotal observation.

❌ Option C describes missing information that could strengthen the argument's scope but does not pinpoint the primary logical flaw in drawing a causal conclusion from mere correlation.

❌ Option D, while a true statement about waste, is irrelevant to the argument's core claim about the recycling program's impact on costs from the waste that *is* recycled.