选择正确的选项补全对话。

A. This is my father. B. Who's that man? C. Who's that woman? D. Is this your grandmother（祖母）?

Tom: It is a photo（照片）of my family.

Sarah: That is good.

Tom: She is my mum. Look!

Sarah: Your father looks young（年轻的）.

Tom: He is my grandfather（祖父）.

Sarah:

Tom: Yes, she is.