Martha McClintock Found That the Menstrual Cycles of Female College

Martha McClintock found that the menstrual cycles of female college roommates became synchronous after 6 months of living together. She also found that armpit odors from one group of women affected the menstrual cycles of other women who sniffed the odors. These findings might indicate that

A) something in the water in the dorm influences the women's cycles.
B) women have conscious control over their menstrual cycles.
C) eating the same foods causes menstrual cycles to become synchronous.
D) menstrual cycles are not influenced by nerve impulses.
E) pheromones are involved in menstrual synchrony.