Figure 204 Humans, Chimpanzees, Gorillas, and Orangutans Are Members of a a Clade

Figure 20.4 Humans, chimpanzees, gorillas, and orangutans are members of a clade called the great apes, which shared a common ancestor about 18 million years ago. Gibbons and siamangs comprise a clade called the lesser apes. Tree-branch lengths indicate elapsed time.
-The great apes comprise the family Hominidae, whereas the lesser apes comprise the family Hylobatidae. If the extant organisms on the far right side of Figure 20.4 comprise the next-most exclusive (i.e., specific) taxon, then they comprise different

A) subspecies.
B) species.
C) genuses.
D) genera.
E) orders.