Kyle Could Feel Himself Coming Down with a Nasty Cold

Kyle could feel himself coming down with a nasty cold. His roommate, Dave, had been bragging about a new cold remedy he had discovered, guaranteeing that the remedy cured the common cold. Kyle went to Dave's room and asked him some questions about this new cure. Kyle was demonstrating critical thinking skills by asking

A) what advertising the manufacturers had done to support their claim of a cure
B) to try a sample of the remedy
C) whether there was another plausible explanation for the remedy curing the common cold
D) how much of the remedy needs to be taken and how often it needs to be taken