On this chapter quiz for this course you can study for up to four hours If you don't study at all you will get a 70. One hour would give you an 80, the second hour increased your score to 89, the third to 92. If you studied the fourth hour your score would be 87. In which hour did diminishing returns set in? a. The second because your gain is less than the previous hour. b. The fourth because you had a drop in points in this hour. c. The third because your score peaked there. d. The first because the score was the lowest of the studying options.