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. Tofu is good for    _  .

Choices:
A) young people
B) old people
C) young and old people
D) students
gpt
The correct answer is 2: young and old people.