Sasha Wants to Study Whether Portion Size Is Related to Body

Multiple Choice

Sasha wants to study whether portion size is related to body image. She observes people eating in the dining hall between the hours of 7pm and 8pm and draws her conclusions. Unfortunately, her research was flawed because the only people who eat so late at the dining hall are athletes. What did Sasha fail to use?

A) mundane realism
B) a representative sample
C) covert measures
D) deception