A) Stay in a warm environment (this is different from "staying warm").
Correct. Please choose another answer.
This has to do with keeping the virus out of the lungs by keeping the temperature of the bronchial epithelium as high as possible. The only death in the 1976 Swine Flu virus outbreak at Ft. Dix, New Jersey, occurred in an Army recruit who was on a strenuous march during a very cold night. He probably "sucked" the virus down into his lungs while his lower respiratory tract epithelium was cooled below core body temperature.