given that the costs of mounting a fever are less than the benefits, the principle of asymmetric harm predicts that natural selection should result in which of the following? group of answer choices fevers only occur when an infection has progressed far enough that a fever will be necessary to help clear it. a fever response is mounted more often than it is actually needed to help defend against an infection. frequent cases where fevers would be beneficial but a fever response is not mounted evolution of lower basal body temperatures