Question

When we say that an experiment is controlled, we mean that _____.
A. the outcome is certain
B. the theory has already been supported
C. there is only one theory being tested by the experiment
D. there is only one difference between experimental groups

Answer 1

Answer:

c

Explanation:

An experiment in which an observer tests a hypothesis by looking for changes brought on by alterations to a variable. In a controlled experiment, an independent variable is the only factor that is allowed to be adjusted, with the dependent variable as the factor that the independent variable will affect.

in Basic terms  The control group provides a baseline that lets us see if the treatment has an effect.

Answer 2

C. There is only one theory being tested by the experiment