4. In the first sentence, how does the author give the clue to determine his purpose in writing the text? A. It signals the citizenship of the author. B. It signals that the selection is a fiction. C. It signals that the author is talking about math. D. It signals that the author may ask readers to do something to help others. 5. The purpose of the text is to A. to entertain B. to expose C. to inform D. to persuade​