For #13: I eliminated B and C, and D and E are the same (M can't be in 1+ areas)... so that leaves me with A. But I don't understand why J has to be in exactly two areas.
Notice the question doesn't ask for what "must be true." Since it "could be true" that J is within exactly two of the areas - answer choice (A) is correct.
You can see a hypothetical that shows answer choice (A) could be true attached.