For acceptable order questions, go through the rules and use them to eliminate answers one by one.
Rule 1 eliminates B. The Turner must be closer to the entrance than the Whistler.
Rule 2 eliminates A. The Renoir must be closer to the entrance than the Morisot.
Rule 3 eliminates D. The Pissarro and the Sisley must be next to each other.
Rule 4 eliminates E. The Vuillard must be third or fourth, not second.
C is CORRECT. It violates no rules.
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