【单选题】

Questions 1 to 5 are based on an interview.At the end of the interview you will be given 10 seconds to answer each of the following five questions. Now listen to the interview. What’s the main content of the book Survival of the Sickest

A、It gives conventional account for medicine.
B、It introduces the dietary regime for the sick.
C、It sees various medical issues in a new light.
D、It offers tips on survival in the wilderness.