What assumption should be made to prove this conjecture by contradiction? if it is raining, then i will not go swimming.

Here are some options to make deciding easier-

A) you went swimming
B) it is raining
C)you are not swimming
D) it is not raining

I think that the answer would be A because the opposite of it not raining would be it raining and the effect of that is that you will go swimming.

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