Once you try a drug amd you like it you get hooked so alot of people are hooked on drugs
The correct answer to this question is that the blueberries were grown using organic fertilizer in a greenhouse.
let me know if you have any further questions
:)
Explanation:
a) This is a retrospective observational study.
b) This is an appropriate choice due to the rareness of MS.
c) The subjects were US military personnel, some of which had developed MS.
d) The variables were the vitamin D blood levels and whether or not the person developed MS.
