Which of the following is true regarding vitamin C?
a. Daily sun nourishment provides enough vitamin C to maintain bone health.
b. Vitamin C is a necessary vitamin for a pregnant mother to take for proper fetal growth.
c. Research has shown there is no significant relationship between vitamin C supplementation and cold prevention.
d. Vitamin C toxicity results in bleeding gums and poor wound healing.
e. Women must ingest 15 mg/day of vitamin C compared to men.