This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
A 33-year-old woman is seen for evaluation of infertility. She complains of dyspareunia. On vaginal examination, tender nodularity along the uterosacral ligaments is noted. What is the diagnosis? 
Select and explain. 
A. Adenomyosis, B. Diethylstilbestrol (DES)-related disease, C. Subserosal fibroids, D. Endometriosis
D: Endometriosis
Answer: D: Endometriosis 
Explanation: Tender uterosacral ligament usually are a sign of endometriosis. Although the other conditions listed may be associated with some form of pelvic pain, they do not produce tender uterosacral ligaments.