The Fact That Both Endothermic and Exothermic Vertebrates Induce Fever

Multiple Choice

The fact that both endothermic and exothermic vertebrates induce fever, by different mechanisms, in response to infection supports which of the following hypotheses?

A) Vertebrates do not experience a coevolutionary arms race with pathogens.
B) All vertebrates are susceptible to infection by the same pathogens.
C) Fever evolved by genetic drift.
D) Fever is adaptive; it may somehow be advantageous in dealing with infection.