Question

2 what is a control group? a the results of the experiment b the group that does not received the tested variable c the part of the experiment that stays the same d the group that does receive the tested variable

Explanation:

In an experiment, a control group is used for comparison. It is not exposed to the tested variable (treatment), while the experimental group is. Option A refers to results, not a group. Option C describes constants (controlled variables), not the control group. Option D is the experimental group. Option B correctly defines the control group as the one not receiving the tested variable.

Answer:

B. the group that does not received the tested variable