The same division can’t be toured on Monday and Tuesday, for this question.
(On my diagram, I drew an arc underneath the two days and drew a line through it to remind myself of this local rule.)
This tells us that S can’t be toured on Monday. And we already know that O can’t be toured on Monday.
So, P must be toured on Monday. This deduction eliminates answers A-D!
A and B are wrong because P is inspected earlier than any other division.
C is wrong. If S were on Monday, S would also be on Tuesday. But this question doesn’t allow Monday and Tuesday to be the same.
D is wrong because P has to be on Monday. If P were on Tuesday too, then the two days would be the same. But this question doesn’t allow that.
E is CORRECT. Here’s how it could look:
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