Apparently I ' m very allergic to cats . Did n't know that exactly until just these past two weeks . I fell asleep on the couch in the living room two weekends ago and had terrible sinus reactions . But here 's the rub .
Why did falling asleep on the couch and becoming ill lead the speaker to realize they must be allergic to cats ?
Pick the best answer from the following options:
- None of the above choices .
 - The cat was confused at the fact of them sleeping on the couch and proceeded to scratch them
 - The cat had peed on the couch to try to mark it 's territory and this is what the speaker was allergic to
 - The couch is where the cats frequently reside and as a result it is covered in their fur


The couch is where the cats frequently reside and as a result it is covered in their fur