Which Statement BEST Captures the Relationship Between Extraneous Variables and Confounding

Multiple Choice

Which statement BEST captures the relationship between extraneous variables and confounding variables?

A) Extraneous variables and confounding variables are the same thing.
B) An extraneous variable is one type of confounding variable.
C) A confounding variable is one type of extraneous variable.
D) Extraneous variables occur in correlational research, whereas confounding variables occur in experimental research.