E Choose the correct response. 2 A: I'm afraid it's infected. B: a Yes. Sure. b: What should I do?

It seems like you are asking about choosing the correct response in Russian. The correct response in Russian would be:

B: a Yes. Sure. (Да. Уверен)

This response is the correct choice in this context. If you have any more questions or need further clarification, feel free to ask!