阅读短文,选择正确的序号。
Hello, My name is Mike. My birthday is on April 5th. I have a big family. My father, my mother, my grandfather, my grandmother and my little puppy. My grandmother's birthday is on January 1st. My grandfather's birthday is on September 2nd. My mother's birthday is on November 30th. My father's birthday is on August 21st. Do you want to know when is my little puppy's birthday?
A. My birthday
B. My grandpa's birthday
C. My grandma's birthday
D. My mum's birthday
E. My dad's birthday