Which of the following criteria is NOT required in order for a mosquito-borne virus to become endemic in a new location?

A) A person infected elsewhere must travel to the new area.
B) A local mosquito must bite a person who has the disease in order to spread it to someone else.
C) The virus must move from an Aedes mosquito to another insect vector.
D) The virus must move from the local mosquito to a local animal that can then serve as a reservoir.
E) The local mosquito must bite another human in that area and give him or her the disease.