单项选择题

Patty: Hello, could I speak to Mrs. Lee, please Betty: This is Betty Lee. Patty: Oh, Betty, this is Patty Wong. Bill and I will be having a buffet party next Saturday, and we’d like you to join us. Betty: We’d love to, Patty. ______ Patty: Oh, we’re celebrating our tenth wedding anniversary.

A. What time do you want us to come
B. What’s the occasion
C. Who else are you inviting
D. How long will it be