Hoa is asking Hai, who is sitting at a corner of the room, seeming too shy

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges

Hoa is asking Hai, who is sitting at a corner of the room, seeming too shy.

Hoa: “Why aren’t you taking part in our activities? _______” - Hai: “Yes. I can. Certainly.”