To Have High Species Diversity in an Ecosystem, You Need

To have high species diversity in an ecosystem, you need which of the following combinations?

A) High species richness, and uneven but high species abundance
B) High species richness and even species abundance
C) High species evenness and richness, but not necessarily high abundance
D) High but uneven abundance and low species richness
E) High and even species abundance and low species richness