A. Choose A, B, C, or D for the correct answer.

The following dialog is for questions 5 to 7.

Mr. Anto: Let's join grandpa. He is cultivating paddies right now.

Riska: How will we go there, Dad?

Mr. Anto: On foot.

Riska: Isn't it too far, Dad?

Mr. Anto: No. We can enjoy fresh air while walking.

Riska: But, Dad, it's very hot. 

Mr. Anto: O, come on. It's not a big problem. You can put on your cap.

Riska: O.K., Dad

Mr. Anto: Dear, you should know that life needs to struggle. See your grandpa. He is still fit and strong at his age.

Riska: Yes, Dad

Mr. Anto: Don't forget to bring your grandpa's lunch.

Riska: Sure.

Why does Mr. Anto feel proud of Riska's grandfather?