Which of the following is best supported by the...

Câu hỏi:  Which of the following is best supported by the passage?

A To effectively control pollution, local government should regularly review their air pollution laws.

B One of the most important steps in preserving natural lands is to better enforce air pollution laws.

C Scientists should be consulted in order to establish uniform limits for all air pollutants.

D Human activities have been effective in reducing air pollution.