单项选择题

Passage One
Questions 26 to 28 are based on the passage you have just heard.

A.They are healthy, normal-weight men and women in their 40s.
B.They ate only one meal every day during the study.
C.They lost an average of 8 percent of their weight by the end of the study.
D.They have lower blood pressure and cholesterol by the end of the study.