PT 65, S4, Q12 (Determine the Function)
(C) is correct.
For determine the function questions, you must always start by finding the conclusion (much like assumption family questions). From there, you can relate the element in question to the conclusion; unless it is the conclusion, it will usually either support or oppose the conclusion.
The conclusion of this argument comes all the way at the end, and is signalled by the word "so": "Jazz consists largely of voicelike horns and hornlike voices." The rest of the argument provides support for this conclusion"”a singer who thought of her voice as a horn, and some horn players who mimic the voice. Lets see if this is enough to get the answer.
(A) Whoops. The first sentence is not the conclusion of the passage.
(B) Same deal. Not the conclusion.
(C) This says it supports the main conclusion, and also some other stuff. Keep it for now.
(D) This says it supports the main conclusion, and some different stuff. Gotta keep it, too.
(E) Uh-oh. This one also says it supports a conclusion.
A simplistic view of the first sentence as just a supporting premise for the conclusion is not enough to get to the answer. Let’s try to parse the details of our three remaining answer choices to continue eliminating.
(C) This says it’s a statement "for which some evidence is provided." Do we get evidence that "jazz singers use their voices much as horn players use their instruments"? Yes! In the next sentence, Billy Holiday is an example of that very point!
(D) This says it’s a statement "for which no evidence is provided." But we already noticed Billie Holiday. This answer is no good.
(E) This says it’s a statement that supports a conclusion that then supports the main conclusion. That sure is confusing! It can help to think about the sentence with Billie Holiday. That sentence is providing support for the first sentence of the passage (some vocalists use their voices like horns), which is in turn supporting the main conclusion of the passage. Actually, (E) would be the correct answer, if we’d been asked about the sentence with Billie Holiday in it. Unfortunately, we weren’t. The first sentence of the passage directly supports the conclusion, not some intermediate conclusion.