For this question, P speaks on friendship. Whenever a question gives you a new rule, think how it affects or is affected by existing rules.
P can’t be a geology major, and M always speaks on friendship. So that means M must be the geology major, and P is the history major.
N has to speak on geology, so she takes that spot in the liberty speeches. I put O in the only spot left.
As you can see, the only points of uncertainty are R and O. They can each major in journalism or history.
This disproves A, B, C, and E.
D is CORRECT.
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