Which statement related to the condition of endometriosis accurately describes it's pathophysiology?
a. Endometriosis is characterized by the presence and growth of endometrial tissue inside the uterus.
b. It is found more often in African-American women than in Caucasian or Asian women.
c. Endometriosis may worsen with repeated cycles or remain asymptomatic and disappear after menopause.
d. It is unlikely to affect sexual intercourse or fertility.