Professor Jones Has Observed a Correlation Between Students Sitting in the Front

Multiple Choice

Professor Jones has observed a correlation between students sitting in the front of the room and getting better grades in her classes.In order to conduct an "experiment" on this,Professor Jones could

A) collect data on student study habits.
B) assign students randomly to seats.
C) adjust her data for overall grade point average.
D) obtain similar data from other professors and classes.