Pop off now. Thanking God that last section was experimental XD

@Amelia_D Same question here. Totally understand the right answer, but D is also pretty suspect to me as well.

@jaydenca It's because stretching potentially could have actually helped the people who stretched, but since they are naturally prone to injury more, both effects offset. Like stretching reduces injury risk, but being prone to injury increases risk at the same time, so stretchers get injured at the same rate as non-stretchers on average.

@GDatria715 It eliminates an alternative hypothesis that people with perfect pitch relatives may receive extra musical training, allowing them to develop perfect pitch or something of the sort.

@isabellagirjikian Yes, if I'm reading your question right, you can flip the some statements. Listeners <-s-> Self-centered can be flipped to Self-centered <-s-> Listeners, and that goes for all cases.

Question 1, does "where hunting is permitted" not act as a complete modifier for "In surrounding counties?"

I answered "surrounding counties -> /(deer population increases" and vice versa with the contrapositive since I assumed "where hunting is permitted" applied to ALL surrounding counties. Not that it is pointing out a subset of surrounding counties. How are we supposed to tell the difference?