单项选择题

Directions: You will hear three pieces of recorded material. While listening, answer each question by choosing A, B, C or D. You will hear each piece only once. Questions 11—13 are based on a report about obesity. You now have 15 seconds to read Questions 11—13. At least, how many years will People who are overweight at 40 lose

A.One year
B.Two years
C.Three years
D.Four years