Question

What is a control group?

A. An experiment where you only test two variables at a time.

B. An experiment that you don't change any variables.

C.An experiment where you only make quantitative observations.

D An experiment where data is collected.

Answer 1

B. An experiment that you don't change any variables.

Step-by-step explanation:

Answer 2

B. An experiment that you don't change any variables.