Daniel and Sasha Are Very Active and Healthy

Daniel and Sasha are very active and healthy. They eat right and exercise daily. Daniel often engages in long distance runs and then takes a hot bath before he and Sasha have sexual intercourse. When they visit a specialist about their inability to conceive, what is one issue that the physician will likely point out?

A) The warm water from the bath would help Sarah conceive.
B) Sarah is probably exercising too much.
C) David's runs could be causing issues with conception.
D) David needs to take a shower instead.