从所给出的句子中选出合适的完成对话。

A. You are right. B. How does it feel? C. It's so sour.

D. Is it pear or a lemon? E. Is it an apple?

Tom: Touch this, Alice.

Alice: It's hard.

Tom: What is it?

Alice:

Tom: No, it isn't. Smell it, please.

Alice: Is it a lemon?

Tom: Taste it. How does it taste?

Alice: It's a lemon.

Tom: