According to recent research with college populations, what was found to be true in relation to sperm production?

According to recent research carried out on male populations that donated sperm in college, it was observed that sperm production decreased at the period that was close to exam, and during exam as well, but sperm production was higher at the beginning of the semester.

answer; i believe that the correct answer is (behavioristic)good luck

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.