A dependent variable is:

A. Measured to show the effect of a change.

B. Collected to draw conclusions.

C. Kept the same to make an experiment a fair test.

D. Changed to test a hypothesis.

Answer is A. Measured to show the effect of a change.

Dependent variable is the variable that changes. It is the only thing that changes in an experiment. That way the if a change occurs the reason is obvious because only one thing changed. The answer would be A.