The author’s purpose for including the underlined phrase is that he wanted to describe the main argument for this text, i.e., option C.
Gordon and Mildred Gordon's novel Cat seems to be about a cat who helps the FBI track down a pair of mobsters. Doubleday first published it in 1963.
The author’s purpose for including the underlined phrase is that he wanted to describe the main argument for this text.
Thus, the correct option is C.
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