Astudy 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.