Available Evidence Suggests That the Virus That Causes AIDS, the HIV-1

Multiple Choice

Available evidence suggests that the virus that causes AIDS, the HIV-1 virus,

A) was introduced into the population of homosexual males in the 1980s.
B) is a virus that "jumped" from nonhuman primates to humans.
C) was a genetic mutation that resulted from germ warfare experiments.
D) is a single strain of virus.