An Athlete Takes Vitamin and Mineral Supplements Prior to Competition

An athlete takes vitamin and mineral supplements prior to competition because he believes they can enhance performance.How would you respond to this belief?

A) The practice does not improve performance because there is not enough time for them to be combined with other appropriate substances so they can do their work.
B) The practice is beneficial because athletes tend to be deficient in vitamins and minerals.
C) The practice has been supported by research and advocated by health care professionals.
D) The practice improves performance because the vitamin has time to combine with its other appropriate parts before competition.