A study was conducted to determine the effectiveness of varying amounts of vitamin C in reducing the number of common colds. A survey of 450 people provided the following information:


Daily amount of Vitamin C taken

None 500 mg 1000 mg

No Colds 57 26 17

At least one cold 223 84 43


What conclusion can be made?


A.) Approximately 64% of the people that had at least one cold did not take vitamin C.

B.) The data proves that vitamin C has no effect on the number of common colds.

C.) The data proves that vitamin C reduces the number of common colds.

D.) Approximately 50% of the people that had at least one cold did not take vitamin C.

E.) Since common colds are caused by viruses, there is no reason to conclude that vitamin C could have any effect.