What is a tropical rain forest?

A.a densely wooded area that receives an annual rainfall of at least 100 inches and has broad-leafed evergreen trees that form a continuous canopy

B.territory located adjacent to a coastal plain that has low humidity and numerous trees

C.a large cluster of wide-leafed trees with blossoms that appear in the spring, last through the summer, and then drop in the fall when it rains

D.a place with low growing shrubs and other plants that benefit from daily rainfall