A study is testing the effectiveness of a new allergy medication. Sixty people who reported they have allergies volunteered to be part of the study and were randomly assigned to one of two groups, as shown in the design web.
Which of the following accurately describes the benefit of comparison in the experiment shown in the design web?
A) The level of allergic symptoms in both groups can be compared to see if the new medication had a significant effect.
B) The overall level of allergic symptoms can be used to determine if the new allergy medication had a significant effect.
C) The level of allergic symptoms in the group who received the medication can be used to determine if the medication had a significant effect.
D) The level of allergic symptoms in both groups cannot be compared to determine if the medication had a significant effect because one group only received a placebo.
