In a different part of the world, namely in parts of southeast Asia, the same virus is associated with a different kind of cancer of the throat. Which of the following is most probable? A) Viral infection is correlated with a different immunological reaction. B) The virus infects the people via different routes. C) The virus only infects the elderly. D) The virus mutates more frequently in the Asian population. E) Malaria is also found in this region.