Câu 138: GMAT Section 3 Verbal Ability: Section Three Verbal Ability

Clarinet reeds often lose their freshness become less responsive after a few weeks of intense use. One clarinetist has hypothesized that a buildup of oil, rather than changes in the material properties of the reed, were responsible. Which of the following investigations is most likely to yield significant information that would help to evaluate the hypothesis?

1. A. Determining what kind of wood is used to make the reeds used by jazz clarinetists.
2. B. Determining whether jazz clarinetists make their reeds lose their freshness faster than do classical clarinetists.
3. C. Determining whether identical lengths of reeds, of the same thickness, lose their freshness at different rates when put onto various brands of clarinets.
4. D. Determining whether rubbing various substances on the new reed causes them to lose their freshness. — đáp án hiện tại
5. E. Determining whether a fresh reed and one that has lost its freshness produce different qualities of sound