This question asks what must be true if L works on the same piece on Tuesday and Thursday.
That means that L passes the workpiece to someone else on Wednesday, and that person passes it back to L for Thursday.
First of all, you can eliminate A, B and C. It doesn’t matter what happens on Monday. It only matters who has L’s workpiece on Wednesday, between Tuesday and Thursday. The first day order does not matter on this game.
Now, we have to choose between D and E. Fortunately, D is impossible. L can’t pass it to J; that’s rule 3.
E is CORRECT. Note that this is basically the same question as 21. Only K and L can pass a piece between the two of them. And that’s what is happening on this question. L passes to K, who passes back to L. No other two people can do that.
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