Question

how is the control group treated differently from the experimental groups?
it gets the maximum amount of the treatment.
it does not receive the treatment.
there is no difference
it is kept in completely different conditions.

Explanation:

In an experiment, the control group is used as a baseline for comparison. The key characteristic of a control group is that it does not receive the independent variable (the treatment) that the experimental groups receive. The first option is incorrect because the control group doesn't get the treatment, let alone the maximum amount. The third option is wrong as there is a difference (the treatment) between the control and experimental groups. The fourth option is incorrect because the control group should be kept in similar conditions to the experimental groups except for the treatment, to ensure that any differences in results are due to the treatment and not other factors.

Answer:

B. It does not receive the treatment.