Why does the tropical rain forest contain an abundance of antibiotic compounds?

a. the area is crowded, leading to random production of useful compounds
b. the area is wet. plants had to develop resistance to fungi and bacterial infections
c. there is a great diversity of plants, leading to random production of useful compounds

C

Explanation:

The rain forest zone contains an abundance of plant species available for pharmaceutical research and attempt at the synthesis of new drug compounds. The abundance of rainfall helps these many plant species to thrive and are available for use in the development of new drugs.

doctrine that the us had the right to expand throughout north america.