单项选择题

My name is Li Ping. I’m a middle school student. I’m in class Three, Grade One. My teacher is Miss Gao. At school I have a friend. His name is Tom. He is English. He’s fourteen. He is in Class One, Grade Three. His teacher is Mr. Green.
Who is their teacher

[A] Miss Gao.
B. Mr. Green.
C. Miss Gao and Mr. Green.