【单选题】

Since chimpanzees are genetically very similar to humans, ______.
A．chimpanzees are likely to suffer AIDS just like humans if they are infected.

B．it does not matter if human beings are infected with SIV rather than HIV - 1.
C．we can use human vaccines to prevent chimpanzees from getting AIDS virus.
D．AIDS vaccines based on chimp' s immune mechanism are possible to be made.