Careful writers document their sources to 1. protect themselves against charges of plagiarism 2. strengthen their arguments and add credibility to their reports 3. the reader learn more 4. all answer choices are reasons to document report data

All answers are correct which is number 4. When you have shortened, rephrased, or cited other people's work, it is vital that the basis of that info be specified. Using other peoples' arguments and thoughts is a normal exercise in advanced writing: it helps give power to your opinions; it helps show that you are acquainted with the argument which environs your subject; it gives penetration and diversity to your paper.

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