What is the possible relationship between Sam and

单项选择题

SECTION A CONVERSATIONS In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow. Questions 1 to 4 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation.

What is the possible relationship between Sam and Sally

A．They are father and daughter.
B．They are very close friends.
C．They are doctor and patient.
D．They are teacher and student.