3.Harvard University recently changed its grading policy to recommend to instructors that the average course mark should be a B. This was the result of a study showing that more than 50 percent of students were receiving an A or A for coursework. Harvard students are often referred to as "the best and the brightest," and they pay $27 000 (US) for their education, so they expect high grades. Discuss the impact of this change in policy on the motivation of Harvard students to study harder.