Which of the following sexually transmitted bacterial diseases is a common cause of infertility and ectopic pregnancies in the United States?

a. Genital herpes
b. Celiac disease
c. Chlamydia
d. AIDS
e. Multiple sclerosis
f. Syphilis
g. None of these choices
h. All of these choices
i. Gangrene
j. Human papilloma virus
k. Candida
l. Oral Herpes