A、Headache. B、Stomachache. C、Ear infection. D、Sore throat. C题目问女士为什么要服用药物。对话中女士说由于耳朵感染而吃药物。故选C。

W：Before I go for the dinner, I need to take my medicine.
M：Are you still having those headaches?
W：No, this medicine is for my ear infection.
M：Just don’t take the medicine on an empty stomach, you’ll get a stomachache!
Q：For what is the woman taking the medicine?