Please answer the following question: I'm taking a test and have to guess the right answer to the question after the article. Article: Kate White has a big family. There are nine people. Her grandfather's name is James White. He is a doctor. Her grandmother's name is Alice White. She is a housewife . They have a son and a daughter. Her father's name is Thomas White and he is an actor. Her mother's name is Jenny White and she is a nurse. Kate is 13 years old and she is a junior high school student. She has a little brother, Jimmy. Jimmy is three. Charles in her uncle, and Casey is her aunt. They are teachers. They have a baby. His name is Tommy. Kate likes her family very much. ,. Question: How old is Kate? Options: A: Nine. B: Thirteen. C: Three. D: Four.
A:
B