Aisles three and five are in every answer choice. You don’t have to test those.
A is wrong because it says Manny can be in the first slot. The third rule says that can never happen.
B is wrong because it says Manny can be in the
ninth slot. That leaves no room for Olga to come after Manny.
So you have to see if Manny can go in 4, 6 and 7. Turns out he can go in all of those places, so D is CORRECT. Here are a couple of diagrams that prove he can go in those spots:
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