Microbial Diversity Is Thought of in Terms of Phylogenetic Diversity

Microbial diversity is thought of in terms of phylogenetic diversity and functional diversity because

A) similar functional traits are often found in divergent phylogenetic groups.
B) phylogenetic diversity dictates functional diversity in microbes.
C) functional diversity only pertains to functions that are not phylogenetic.
D) similar phylogenetic groups almost always have similar functional traits.