Which of the Following Is a Particular Advantage of the Experimental

Which of the following is a particular advantage of the experimental method?

A) It allows researchers to examine a number of different variables at the same time.
B) It allows researchers to examine the relationship between variables in natural settings.
C) It allows researchers to make predictions based on observed relationships between variables.
D) It allows researchers to manipulate independent variables and establish their causal impact on dependent variables.
E) It is often more convenient than experimental methods.