An Example Cited by the Text of How Grassroots Opposition

An example cited by the text of how grassroots opposition to a governmental action can influence Congress is

A) the Food and Drug Administration's banning of saccharin.
B) the Forest Service's banning of campfires in national parks.
C) the Environmental Protection Agency's approval of acid rain.
D) the Central Intelligence Agency's approval of strategic assassination.
E) the Internal Revenue Service's approval of electronic filing.