A、The man. B、Too little sleep. C、A hat. D、The sun. D男士说女士要少晒太阳，服用阿司匹林，并建议让女士戴帽子，由此可知女士头疼的原因可能是因为晒多了太阳。故选D。

W: Professor Mandy hinted that she wasn’t that keen on students using Internet sources in their paper and seemed disappointed so many had.
M: I’m just wondering if she’ ll take it out on me, especially. I used practically nothing else in mine.
Q: What does the man imply?

W: My headaches are terrible. Maybe I need more sleep.
M: Actually, you need less sun and some aspirin. Plus it would help if you wore a hat. The sun is too bright.
Q: According to the man, what probably caused the woman’s headache?