<em> Quotation marks </em>are used for several puposes such as nicknames, translations, measurements etc. One use is to give a word or a sentence a s<em>cary or serious meaning or to emphazise that the word is being used as an</em> <em>euphemism or </em> <em>for terms used in an unusual way or for technical terms</em>. For sarcasm the proper use is of <em>single quotation marks.</em>
Examples is the correct answer because the sentence says that they "can be both real and hypothetical". In the answer choices examples best fits because these can be real or hypothetical. Testimonies are always someone's truth. Statistics are also real. Narrations are real as well since they tell a story about someone.