Which of the following is the most probable fate of a newly emerging virus that causes high mortality in its host?

A)It is able to spread to a large number of new hosts quickly because the new hosts have no immunological memory of them.
B)The new virus replicates quickly and undergoes rapid adaptation to a series of divergent hosts.
C)A change in environmental conditions such as weather patterns quickly forces the new virus to invade new areas.
D)Sporadic outbreaks will be followed almost immediately by a widespread pandemic.
E)The newly emerging virus will die out rather quickly or will mutate to be far less lethal.