I believe the answer is a.
Correct answer choice is :
<h2>C) Is unsafe and not recommended. </h2><h2 /><h3>Explanation:</h3><h3 />
If used inaccurately or in abundance, these vitamins may be a potential health danger. Vitamins are necessary nutrients which, in aggregate with other nutrients, promote natural metabolism. Megadoses of vitamin C complements might prompt Diarrhea and Nausea.
That is a true statement.
