听下面一段较长对话，回答以下小题。
【小题1】What is the probable relationship between the speakers?

A．Tourist and guide.

B．Father and daughter.

C．Interviewer and interviewee.

【小题2】What was the most difficult part of the mountain climbing according to the man?

A．The ice was dangerous.

B．The snow was deep.

C．The rocks were small.

【小题3】How long did it take the man to climb up the mountain?

A．About 6 hours.

B．About 12 hours.

C．About 15 hours.