The best jazz singers use their voices much as horn players use their instruments. The great Billie Holiday thought of her singing voice as a horn, reshaping melody and words to increase their impact. Conversely, jazz horn players achieve their distinctive sounds by emulating the spontaneous twists and turns of an impassioned voice. So jazz consists largely of voicelike horns and hornlike voices. Which one of the following most accurately describes the role played in the argument by the claim that the best jazz singers use their voices much as horn players use their instruments? ["It is a statement used to support a conclusion that in turn is used to support the argument's main conclusion.", "It is a statement for which some evidence is provided and which in turn is used to provide support for the argument's main conclusion.", "It is the argument's only conclusion, and each of the other statements in the argument is used to support it.", "It is the argument's main conclusion and is supported by another statement, which is itself supported by a further statement."]