The major difference between the experimental and correlational methods is that in the experimental method the presumed causal variable is whereas in the correlational method the same variable is

manipulated, measured

Explanation:

In order to establish a link between variables the effect on variable has on the other variable is measured. The variable which changes independently is called the independent variables. The variable which changes is called the dependent variable.

In a correlational study, the subjects are measured in their natural habitat and not interfered with.

In an experimental study, the independent or causal variable is manipulated and the effect it has on the dependent variable is measured.

Hence, the question is referring to manipulated, measured.

answer; i believe that the correct answer is (c) ///

the correct answer is d