选择正确的句子，使它成为一段完整的对话

A. It's on May 8th. B. My mother's birthday is in May, too. C. When is her birthday? D. Because my birthday is in May.

Amy: May is a special month.

Kitty: Why?

Amy:

Kitty: When is your birthday?

Amy: And my grandmother's birthday is on May 5th.

Kitty: That's fine.

Amy:

Kitty:

Amy: It's on May 18th.