单选题Gary Johnson, a major star in track and field, advertises a certain brand of vitamin supplements for aspiring athletes. Alan runs cross country for his university and has decided to start a fitness regimen including the vitamins to improve his event ra
题目
单选题
Gary Johnson, a major star in track and field, advertises a certain brand of vitamin supplements for aspiring athletes. Alan runs cross country for his university and has decided to start a fitness regimen including the vitamins to improve his event rankings. The statements above, if true, best support which of the following assertions?
A
The vitamins have been shown to improve stamina in scientific studies.
B
Alan’s regimen also includes changes in his workout and diet.
C
Alan is not satisfied with some aspects of his current athletic performance.
D
Gary Johnson used the vitamins to become a major track and field star.
E
Alan has fallen victim to the marketing strategies of the company that manufactures the vitamins.