Whenever you have a cold, you rest in bed, take aspirin, and drink plenty of fluids. You can’t determine which remedy is most effective because of which of the following problems? A. Sampling bias B....

Whenever you have a cold, you rest in bed, take aspirin, and drink plenty of fluids. You can’t determine which remedy is most effective because of which of the following problems?

A. Sampling bias

B. Distorted self-report data

C. Confounding of variables

D. Experimenter bias