What Advantage Does a Germ Have by 'Attenuating

What advantage does a germ have by 'attenuating'?

A) It will be able to kill the host faster.
B) It can stay for a longer period of time in the host, ensuring that a host will not survive.
C) It allows a larger number of hosts to survive, which in turn can supply the germ with a larger population of potential hosts as well as more transmission time.
D) It will be able to take more nutrients from its host, allowing it to be more successful in reproducing more germs.
E) It maximizes its impact on the host to speed up incubation and the appearance of syptoms.