Thanks to the efforts of environmentalists, people are becoming better

A. Environmentalists are expressing their gratitude towards people who are better aware of the problems of endangered species.

B. People owe their growing awareness of the problems of endangered species to the efforts of the environmentalists.

C. People have no idea about the problems of endangered species in spite of the efforts of environmentalists.

D. Environmentalists are doing their best to make people aware of the problems of endangered species.