Guitar strings often go "dead"—become less responsive and bright in tone—after a few weeks of intense use. A researcher whose son is a classical guitarist hypothesized that dirt and oil, rather than changes in the material properties of the string, were responsible.
Which of the following investigations is most likely to yield significant information that would help evaluate the researcher's hypothesis?
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ADetermining whether a metal alloy is used to make the strings used by classical guitarists
分析该选项
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BDetermining whether classical guitarists make their strings go dead faster than do folk guitarists
分析该选项
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CDetermining whether identical lengths of string, of the same gauge, go dead at different rates when strung on various brands of guitars
分析该选项
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DDetermining whether a dead string and a new string produce different qualities of sound
分析该选项
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EDetermining whether smearing various substances on new guitar strings causes them to go dead
分析该选项