the mice that received the placebo

A) independent variable
B) dependent variable
C) experimental group
D) control group

Placebo

A substance with no therapeutic effect, often used as a control in testing new drugs.

Control Group

In an experiment, a group of subjects that does not receive the treatment being tested and is used as a benchmark to measure how the other tested subjects do.

Dependent Variable

In scientific research, the variable that is tested and measured; it is 'dependent' on the independent variable.