My name is John,and I'm from a small town in America. My family is not very big---just my parents, my younger sister and me. My father is a mechanic, and he often fixes cars at home. My mother is a nurse, so she is very busy every day.I'm a student at a vocational school now. I chose to study computer and science because I like working with computers. My favorite subject is programming, though it's a bit difficult. After school, I usually play basketball with my friends. On weekends, I sometimes help my dad in the garage. I think my life is busy but happy.
请在A、B、C三个选项中选出最佳答案。
How many people are there in John's family?