human
Question: It's important for us to be healthy. But how can we keep healthy?  First,you should eat fruit and vegetables  three or four times a week. Then eat some tofu every day because it's good for people, both the young and the old. Milk is also necessary ,especially for  women. So you should have milk twice a day. It can help  you to be strong. Next, doing more exercise is better. You can do morning exercises or evening exercises. After supper you should take a walk. The passage mainly tells us  _  .

Choices:
A) how to keep healthy
B) what health is
C) why health is important
D) how often you can eat tofu
gpt
The correct answer is 0: how to keep healthy.