Interesting question,
WaltGrace1983.
I think that you may have fallen victim to the phenomenon of mental spackle. Sometimes, when an assumption is so natural, we commit the same error that the author does and actually think it has been stated....when it has not.
For this
Necessary Assumption question, let's dig into the core:
PREMISE: The only way for adolescent interests to be represented is to give them the right to vote.
CONCLUSION: Adolescents should have the right to vote.
The premise(s) never actually said that we want adolescent interests represented! It feel reasonable and logical - so much so, that we come away thinking the stimulus actually said it. But it didn't.
Imagine if the argument were this: The only way to ruin the rug is to spill red wine on it. Therefore, we should spill red wine on it. If you
want to ruin the rug that is a great idea! But what if you
don't ?A quick tour of the
incorrect answers:
(A) This would certainly help the conclusion, but we don't need that to be true. The argument could still be valid even with a prohibition on infants voting.
(B) "most respects that are important"? We just need them to differ sometimes.
(D) "all the rights" - we're only talking about
voting rights!
(E) "have never enjoyed" - what happened in the past doesn't change the argument.
When we engage in mental spackling, we read things into the stimulus (or reading comp passage) that aren't actually there, but feel like the next logical step (and perfectly reasonable). It's an incredibly insidious natural tendency.
Does that help a bit?