The Victorian Age, eminently represented by Dickens and Thackeray, was mostly regarded as an age of ______ in English literature.

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.

A．more and more wild chimpanzees are being slaughtered.
B．AIDS virus is difficult to be killed and controlled.
C．it is not easy to repair people's deficient immune systems.
D．many dangerous viruses are being transmitted to humans.