A conservation biologist was studying a population of deer in a wooded area. She noticed a sharp decrease in the population in 2003.
Which is the least likely explanation for the decrease in the deer population?

A.The number of coyotes in the area decreased.

B. A disease infected the deer population.

C. Mountain lions were introduced to this area.

D. More hunters visited the area in 2003.

E. The deer could not find enough food.