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.

To help researchers conclude that results are related to the new drug and not to the orange juice.

Explanation:

c

Explanation:

To help researchers conclude that results are related to the new drug and not to the orange juice.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b