A Research Team Wants to Know If Sugar Consumption Is

Multiple Choice

A research team wants to know if sugar consumption is related to hyperactivity. Researchers give fifty children cupcakes made with real sugar and another fifty children cupcakes made with zero-calorie sugar substitutes. They then observe each child individually to assess his or her level of activity after eating the cupcakes. This is an example of

A) a case study.
B) naturalistic observation.
C) experimental research.
D) correlational research.