We’re trying to lock down all the variables. Ilias is the variable with no rules: the hardest variable to lock down. It makes sense to start with the answer choices that mention Ilias.
C is CORRECT. If we put W and Ilias in S, then we need to put H and Y in P, because it’s the only place they’ll fit. That fills up P.
We still have to place G and X. We can’t put X in S. Why? Because if X is in S, then W must go in P (3rd rule).
But this answer choice tells us W is in S, not P. So X must go in M.
We therefore place G in the open space in S.
In other words, C describes our first scenario:
D is wrong because it doesn’t let us decide where to put X, W and I. Any of them can go in M or P.
E is wrong because it doesn’t let us decide whether to put W/G in M or S.
A is wrong because we already knew F was in P. This only tells us where W goes. I and G are interchangeable in this scenario.
B is wrong because we don’t know how to place X, W and I. They could go in M or P.
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