Can Correlational Studies or Experiments Ever Be Conducted Outside of the Laboratory

Multiple Choice

Can correlational studies or experiments ever be conducted outside of the laboratory?

A) No, both of these types of studies are always performed in the lab.
B) Correlational studies can be conducted inside the laboratory or out in the "real world," but experiments are always conducted in the lab.
C) Correlational studies are always conducted in the "real world" and experiments are always conducted in the lab.
D) Both correlational studies and experiments can be performed in the lab or in the "real world."