This question asks for a complete list of everyone who must perform in the afternoon. All of the answers have T, so we must only decide between W, Y and S.
This diagram also shows that Y must go in the afternoon, because there’s no way to place WY any earlier without pushing Z into the afternoon, which violates rule 4.
The right answer to the first question, A, showed that S can go in the morning. So S, W, R and Z don’t have to go in the afternoon.
We’re left with: T and Y must go in the afternoon, and only T and Y. C is CORRECT.
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