[求助]救命啊，又一道新东方补充材料题

119. Residents of an apartment complex are considering two possible plans for collecting recyclable trash. Plan 1-Residents will deposit recyclable trash in municipal dumpsters located in the parking lot. The trash will be collected on the first and the fifteenth days of each month.  lan 2-Residents will be given individual containers for recyclable trash. The containers will be placed at the curb twice a week for trash collection.  

Which of the following points raised at a meeting of the residents, if valid, would most favor one of the recycling plans over the other?

(A) Residents will be required to exercise care in separating recyclable trash from nonrecy- clable trash.
(B) For trash recycling to be successful, residents must separate recyclable bottles and cans from recyclable paper products.
(C) Penalties will be levied against residents who fail to sort their trash correctly.
(D) Individual recycling containers will need to be made of a strong and durable material.
(E) Recyclable trash that is allowed to accumulate for two weeks will attract rodents.

我选C,答案是E。不明白啊：这两种方法都allow recyclable trash to accumulate for two weeks啊，第一种是在公共场所放两周，第二种是在家里放两周（before individual containers are placed at the curb twice a week). 怎么看出这两种的区别呢？

哦，对哦，我怎么连TWICE A WEEK都没反应过来呢

多谢教主啊