To test a new drug that has the potential of curing people of the common
cold, a company asked human volunteers who were coughing and sneezing
to participate in a clinical study. the objective of the experiment was to test
whether the new drug could cure the volunteers in the experimental group of
the common cold. but instead of two groups, these volunteers were randomly
divided into three groups and treated as follows:
group
experimental
group
yes
yes
control
group #1
no
control
group #2
new drug
orange juice
bed rest
yes
no
no
yes
yes
yes
which of the following is the best explanation of why a second control group
was included in this experiment?
o
a. to provide the volunteers in the study with something to drink
o
b. to researchers conclude that results are related to the new
drug and not to the orange juice
o
c. to prove that the common cold cannot be cured
o
d. to confuse anyone who is trying to steal their new drug and sell it
as their own invention