If a Researcher Wants to Conduct a Study on the Framing

If a researcher wants to conduct a study on the framing effect,which of the following would be the most likely topic for the study?

A) "How do math undergraduates and math professors differ in their confidence about decisions?"
B) "How long do people maintain their commitment to an unsatisfactory decision?"
C) "Under what circumstances do people overestimate their ability to predict events that have already occurred?"
D) "Should a product that costs $300 and is marked down to $200 be advertised as only $200 or $100 off?"