DrWarner Is Studying the Effects of Vitamin C Consumption on the Frequency

Multiple Choice

Dr.Warner is studying the effects of vitamin C consumption on the frequency of common colds.To do this,he gives a random half of his sample of participants a large dose of vitamin C to consume daily for one year,while the other group takes a placebo daily for one year.The frequency of colds is recorded for the duration of the year.In this study,what is the control group?

A) the group that gets more colds throughout the year
B) the group that consumes the vitamin C daily for one year
C) the group that consumes a placebo daily for one year
D) the group that gets fewer colds throughout the year