What is the purpose of a signal phrase 1.to ponit out an internal citation to the reader 2.to call attention to plagiarism in information text 3.to indicate the end of text and start of citations

Arrange the events below in chronological order. claudius and polonius hide themselves and listen in on hamlet's conversation with ophelia. claudius decides that hamlet's madness is not caused by neglected love and that he is dangerous. rosencrantz and guildenstern tell claudius that they still do not know the cause of hamlet's behavior. polonius suggests that he will hide and listen as the queen talks with hamlet.