Which of the Following Is a True Statement

Multiple Choice

Which of the following is a true statement?

A) All mammals have menstrual cycles.
B) The endometrial lining is shed in menstrual cycles but reabsorbed in estrous cycles.
C) Estrous cycles are more frequent than menstrual cycles.
D) Estrous cycles are not controlled by hormones.
E) Ovulation occurs before the endometrium thickens in estrous cycles.