Professor Bowden is in the middle of her lecture on marital

satisfaction when a student in the back interrupts her and says, "Dr. Phil doesn't agree with that theory!" Soon other students chime in to add fuel to the discussion. Professor Bowden just smiles and asks the original student to produce the research that Dr. Phil carried out to justify his statements. What lesson is Professor Bowden trying to teach?
A) Information from the media is always inaccurate.
B) One should never question a well-established theory.
C) Always check the source of your information before you believe it.
D) Secondary sources are just as reliable as primary sources.

Answer: C