The Diversity in a Mangrove Marsh Community Is High If

The diversity in a mangrove marsh community is high if

A) the proportion of red mangroves,white mangroves,and black mangroves is equal.
B) the proportion of red mangroves is far greater than white mangroves and black mangroves.
C) there are a few species of mangroves,a few species of invertebrate animals,and a few species of vertebrate animals.
D) All answers are correct.