Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study? A researcher randomly selected 500 college students and asked "How many IQ points would you sacrifice to become better looking?". The following conclusion was published in the student newspaper: "Students would sacrifice 18 IQ points to be better looking."A. Selection bias.
B. The source.
C. Confounding variables.
D. Participation bias.
E. Variables are hard to define/measure.