Final answer:
The answer to the question is the control group, which is a standard for comparison in an experiment and does not receive the treatment being tested.
Step-by-step explanation:
A group that does not receive treatment and is the standard for comparison in a randomized experiment is called the control group. This group receives an inactive treatment but is otherwise managed exactly like the other groups in the experiment. The purpose of the control group is to serve as a basis for comparison and to control for chance factors that might influence the results of the study by holding such factors constant. Therefore, the correct answer is B. Control group.