Sierra, now 31, has been trying to get pregnant since she got married 4 years ago. Her doctor suspects that their infertility problem was likely caused by her history of PID from the most commonly reported STI. During her early 20s, Sierra had contracted .A. Herpes simplex.
B. Gonorrhea.
C. HIV/AIDS.
D. Chlamydia.

Answer

D. Chlamydia

Explanation

Both Herpes & HIV/AIDS are viral infection which do not cause infertility.

Both Gonorrhoea & Chlamydia if untreated can cause PID which can lead to infertility in women.

However, the answer is Chlamydia. This is because Sierra’s doctor made an emphasis by saying " that their infertility problem was likely caused by her history of PID from the most commonly reported STI". Chlamydia is the most commonly reported STI, hence, why it is not Gonorrhoea