Which of the Following Was a Problem with Relying on College

Multiple Choice

Which of the following was a problem with relying on college and university students to be participants in psychology experiments, as mentioned in the text?

A) There is problem in generalizing research results from students to the rest of the population.
B) Students are overly representative of all three socio-economic classes.
C) They are considered to be over-educated.
D) They are only volunteers, and their results may differ from those who would participate for money.