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

This following dialog is for questions 18 to 20.

Mr. Kian: O.K., students. We will have a biological experiment today.

Students: Yes, Sir.

Mr. Kian: Please prepare the materials I've told you before.

Nirina: I am sorry, Sir. I don't know about that.

Mr. Kian:  How could it be? I told you about it last week.

Nirina: I was absent that day, Sir.

Mr. Kian: If you don't know about it, you have to seek information. You can ask your friends.

Nirina: Yes, Sir. I am really sorry.

Mr. Kian: O.K. You may share the materials with your friend

Nirina: Yes, Sir. Thank you.

What should Nirina do, related to her absence?