If you have a control group for your experiment, which of the following is true?
AThe control group is exactly the same as the test group.
BThe control group is identical to each test group except for one variable.
CThere can be more than one difference between the control group and the test groups.
DThe control group and the test groups may have two or more differences between them.
AThe control group is exactly the same as the test group.
BThe control group is identical to each test group except for one variable.
CThere can be more than one difference between the control group and the test groups.
DThe control group and the test groups may have two or more differences between them.