your best friend tells you that she has started taking vitamin supplements to give her energy. how would you respond to her statement? a. vitamins are organic and are a great energy source. b. vitamins provide energy because they undergo oxidation. c. vitamins do not yield usable energy. d. you should drink plenty of water with the vitamins so your body can use their energy. e. you should take the vitamins about 2 hours before exercise to maximize your energy.