Question

question 16 2.5 points in a controlled experimental design, the only variable that should be different in control and experimental groups differ in the. a environmental variable. b controlled variable. c independent variable. d dependent variable. e result.

Explanation:

In a controlled experiment, the independent variable is the one that is manipulated or changed between the control and experimental groups. Controlled variables are kept the same, the dependent variable is what's measured (depends on the independent variable), environmental variables are part of controlled variables, and the result is the outcome. So the only variable differing should be the independent variable.

Answer:

C. independent variable.