This question places Q in the morning. When a question gives you a new rule, you should always see how the new rule affects other rules. In this case, the new rule forces J to go with K. (Rule 1: J must be in the morning, with either Q or K).
That means Q must go on Wednesday. If Q went Thursday, we’d end up with this scenario:

If we place Q Wednesday, we’ll have to place both JK later in the week. We also have to place R with either N or S. It will have to be N. Why? Because we need S to go with Q:

No one else can go there.
- Not JK: they must go together on this question.
- Not N: it has to go after Q (rule 3)
- Not R: it has to go with S or N (rule 2)
So only S is left to go on Wednesday. And therefore, E is CORRECT.

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