20. The city council will certainly vote to approve the new downtown redevelopment plan, despite the objections of environmentalists. After all, most of the campaign contributions received by members of the city council come from real estate development firms, which stand to benefit from the plan.

Which of the following statements, if true, would most weaken the argument above?

(A) Several members of the city council receive sizable campaign contributions from environmental lobbying groups.

(B) Members of the city council are required to report the size and source of each campaign contribution they receive.

(C) Not every real estate development firm in the city will be able to participate in, and profit from, the new downtown redevelopment plan.

(D) The members of the city council have often voted in ways that are opposed to the interests of their campaign contributors.（D）

(E) Some environmentalists have stated that the new downtown redevelopment plan might be environmentally sound if certain minor modifications are made.

偶觉得选a,意思是委员会接受了环保组织的款子，即使接受了也不一定站在捐赠者的立场上，从而否定原文结论：委员会因为接受房产公司捐赠而站在他的立场上。

D有点像和题目对着干的味道，文章说是，D说不是。不明白！！！