W: Really？ Where are you going？
M: I'm planning to visit New Mexico.
W: My sister and I had the vacation there last year and we had a great time.
M: Did you get into Albuquerque？
W: Sure. Whenever we went skating.
M: Is it far from the mountains？
W: Not at all. Even though Albuquerque is on a high flat plateau, there are even higher mountains near it. Just half an hour away from the city there is a snow-covered slope.
M: Well. As the mountains are just thirty minutes away, I guess I should take my ice skate and my skis.
W: Definitely.
M: I heard that the weather there was great.
W: It is "No humidity" but with moderate temperatures, but you do need to be careful about high altitude.
M: What should I do about that？
W: Oh, just take it easy for a few days. Don't go hiking up the mountains or exercise too vigorously. Just do everything gradually.
M: I'm sure I will be fine. And I will let you know all about my trip when I come back.
What is the main purpose of the man's trip？

A. To improve his skating techniques.
B. To climb mountains.
C. To take a vacation.
D. To learn to ski.