单选题

New regulations in Mullentown require manufacturers there to develop five-year pollution-reduction plans. The regulations require that each manufacturer develop a detailed plan for reducing its released pollutants by at least 50 percent. Clearly, the regulations will not result in significant pollution reduction, how- ever, since the regulations do not force manufacturers to implement their plans. Which of the following, if true, most weakens the argument?

A、 Mullentown's manufacturing plants are not the only source of pollution there.
B、 Detailed plans would reveal that measures to reduce released pollutants would also reduce manufacturers' costs for materials, waste disposal, and legal services
C、 Pollutants that manufacturing processes create but that are not released directly into the environment must nonetheless be collected and prepared for disposal
D、 Any reductions in pollutants released from Mullentown's manufacturing plants would not be noticeable for at least five years.
E、 Each manufacturer will be required to submit its plan to a committee appointed by Mullentown's officials.

【正确答案】 B

【答案解析】