Nevermind, I figured it out and here's the answer in case anyone needs it:
The correct answer is D. To get the answer, simply negate the selection. We know that Q,R,F must be on days 4,5,6 respectively. Choice D says that either H or J is scheduled for day 3. So, if neither J or H is scheduled for day 3, then it should fail.
This fails because if G is scheduled for day 3, then Q must be scheduled for day 5. As you can see, Q is not scheduled for day 5. Therefore, D is the correct answer because we cannot put J or H on a day that's not day 3.