Sarula Recently Completed a Compatibility "Quiz" from One of Her

Sarula recently completed a compatibility "quiz" from one of her favorite magazines,and although she and her boyfriend have been dating for nearly two years,the "quiz" results suggested they are not compatible.Luckily,Riley,one of Sarula's friends,is a student of psychology and suggested that the "quiz" may not be valid.What is her friend suggesting?

A) The "quiz" only gives you the answers you want.
B) The "quiz" is going to give you similar results every time.
C) The "quiz" is not very scientific.
D) The "quiz" may not actually measure compatibility.