Which of the Following Is a Disadvantage of Experimental Study

Multiple Choice

Which of the following is a disadvantage of experimental study designs as compared to nonexperimental study designs?

A) Experiments can only be used to examine phenomena in a research laboratory.
B) Experimental designs are more artificial than nonexperimental designs.
C) Experiments establish a cause-and-effect relationship.
D) Experimental designs fail to establish covariation.