Refer to the Figure Showing a Phylogenetic Tree of Immunodeficiency

Multiple Choice

Refer to the figure showing a phylogenetic tree of immunodeficiency viruses. Based on the diagram, which statement about HIV is true?

A) HIV in humans forms a clade.
B) All HIV variants in humans were derived from viruses in chimpanzees.
C) All HIV variants in humans were derived from viruses in sooty mangabeys.
D) HIV likely entered the human population from hunters who cut themselves as they were skinning primates.
E) The two forms of HIV arose from the same simian species.