According to Research Studies,students Earn an Average of One Letter-Grade

According to research studies,students earn an average of one letter-grade higher if they:

A) print out the instructor's PowerPoint slides in advance of a lecture,and highlight the slides during the lecture.
B) wait until after the lecture to read the textbook,so that the textbook will make more sense.
C) take notes by hand and in their own words during a lecture.
D) listen as attentively as possible during the lecture,and don't take notes since that would distract them from the lecture.