The Best Description of the "Green Revolution" Is

The best description of the "green revolution" is:

A) civil disobedience by environmentalist organizations such as Greenpeace.
B) the problem of algae in water resources because of increased use of nitrogen fertilizers.
C) the gain in efficiency of agriculture by various methods including, mechanization, specialization, irrigation, and seed development.
D) uprisings of native populations in tropical countries where the rainforest is being destroyed.
E) the takeover of crop land by noxious weeds.