Question

Medicine A is an effective treatment for the common cold a study was conducted to test the effectiveness of medicine A which question would help determining whether the conclusion above is valid

Answer 1

According to my research I found questions with the same info with option choices and they are:

A.) How many people in the study had the flu?
 B.)  How many people were included in the study?
 C.) What was the average age of the people in the study?
 D.)  What was the most common occupation of people in the study?

Among those options the answer would be the second choice B)

Answer 2

B.) How many people were included in the study?

This is the best answer, as the more people there is, a greater variety of choices is possible, leading to a better result that can usually apply to a larger population.

hope this helps