Although Most of the World's Forests Are Shrinking, Biologists Are

Although most of the world's forests are shrinking, biologists are especially concerned about tropical forest loss because

A) They contain such high biodiversity
B) Tropical trees are the biggest trees in the world
C) They contain irreplaceable wood resources
D) There are fewer remaining tropical forests than any other forest type
E) All of these are reasons that biologists are especially concerned about tropical forest loss