Answer:
C. When you give facts, data, and general information
Step-by-step explanation:
Facts, data, and general information should be paraphrased. You should note the author, but you do not need to use their exact words or style to portray the same information. Just make sure that you change enough of the information, so that you are not directly quoting. It would be appropriate to use direct quotes when word choice is important or when something is insightful or memorable.
While you might decide to paraphrase because you have too many quotes in your essay, this is not a good reason.