Question

A scientist wants to study the effect of vitamin C on colds. He gave 1000 mg of vitamin C per day to 100 people. What would be the best control?

A. Give the control group a pill similar to vitamin C but containing no vitamin C (a placebo)
B. Give the control group 2000 mg of vitamin C per day
C. Give the control group orange juice every day
OD. Give the control group nothing.
O E. Give the control group 1000 mg of another brand of vitamin C per daY

Answer 1

D, I’m assuming that’s their is a another so you give on group nothing and the other group the vitamin C

Answer 2

D

Step-by-step explanation:

Give the control group nothing. They are going to have to use their own blood system to fight the cold. The difference in results will be if Vit C produces better results than the nothing group.