A、The woman goes to work by bike. B、The woman does exercises to keep fit. C、The man chooses public transportation to go to work.

M: Doctor, you told me that right food and plenty of exercise were necessary for my health. But is it OK to drink alcohol?
W: Actually, studies have shown that people who have half a glass of alcohol per day are healthier than those who don’t drink.
Q: What does the woman imply?

W: Hey, Jim. I didn’t know you biked to work. It can protect the environment and keep you fit. I wish I could do it, but I work in the city.
M: Well, you’re doing your part for the environment by using public transportation, too.
Q: What can we learn from the conversation?