According to the passage, which of the following contributes to a dull sound being produced by a violin?
A small body
A long fingerboard
High string tension
Keywords: contribute to a dull sound, produced by, violin.
Clue: “Their instrumental compositions demanded a fuller, clearer, and more brilliant tone that was produced by using thinner strings and a far higher string tension”: Their combination of instruments demanded a fuller, clearer and more prominent tone created by using much thinner and tighter vocal cords..
Thus “dull sound” (dry sound) in the past, partly because the vocal cords were not thin and tight enough. So the correct answer is C. Thick strings.