What is the purpose of a signal phrase?

ATo point out an internal citation to the reader

B.To call attention to plagiarism in informational text

CTo show the need for a reference within an article

D.To indicate the end of text and the start of citations

Verified Answer :

Signal Phrase: a phrase, clause, or even sentence which leads into a quotation or statistic. These generally include the speaker/author's name and some justification for using him or her as an expert in this context; it may also help establish the context for the quotation.

a phrase, clause, or even sentence which leads into a quotation or statistic