October 2010 LSAT Section 2 Question 19

Which one of the following CANNOT be true in a particular calendar year?

Vineyard on October 30, 2023

Why is option D wrong?

Based on the set up, 1-2-1-2 = 6 slots and that does not violate any setup rules. M-W&Y-M-W&Y could have worked. I do not see why D was marked as wrong. Please elaborate further. Thanks

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Emil-Kunkin on November 1, 2023

If there are two Ws, two Ys, and two Ms this would violate the first rule.