Passage: A city's household waste can be collected either from the doorstep or from shared bins placed on the street. Doorstep collection costs more per household. But in the wards where it has been introduced, the volume of waste left lying on the streets has dropped sharply, and the saving on street clearing has been larger than the extra cost of collection. The city should therefore extend doorstep collection to the wards that do not yet have it. Which of the following is the main conclusion of the argument?

Question

Accepted Answer

The city should extend doorstep collection to the wards that do not yet have it. The higher per-household cost and the larger saving on street clearing are both evidence; they are offered in support of the recommendation that closes the passage. That recommendation is what the rest of the passage is for, and so is the main conclusion. The fourth option is a stronger claim than the passage makes anywhere.

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