The Major Difference Between Richness and Equitability Is That

The major difference between richness and equitability is that

A) richness is a measure of biodiversity and equitability is a measure of competition.
B) richness expresses how complicated the organisms that make up an ecosystem are, while equitability only considered the number of organisms.
C) richness is a count of the number of species present in an ecosystem and equitability describes how evenly distributed the populations of each species are.
D) richness describes the number of r-selected species in an ecosystem and equitability expresses the number of K-selected species in an ecosystem.