Question

Although 80% of the dorm residents took vitamin C last winter, half of the dorm residents still got colds. What can be concluded?

a. Vitamin C is ineffective
b. Vitamin C causes colds
c. Dorm living increases the risk of colds
d. Vitamin C is not a guaranteed prevention

Answer 1

The fact that half of the dorm residents still got colds despite 80% of them taking vitamin C last winter suggests that vitamin C is not a guaranteed prevention.

Step-by-step explanation:

The fact that half of the dorm residents still got colds despite 80% of them taking vitamin C last winter suggests that vitamin C is not a guaranteed prevention. While it may reduce the duration, severity, and incidence of the common cold, it is not 100% effective in preventing it. Other factors such as dorm living conditions, exposure to viruses, and individual immune systems may also contribute to the occurrence of colds.