Answer:
A) Being over the age of 35
Explanation:
The answer is the age of the man. Biological men can't ovulate so B can't be the correct answer here. Besides that, endometriosis is a biologically female disorder and biological men can't get it. Strenuous exercise does not lower fertility in males. But it was found that men that are 35 or older have fertility rates of about 25% while men younger than 35 have 52% rates.
