When a reminder is given regarding the credibility of Wiesel being a Holocaust survivor helps in reestablishment of ethos. Hence, option B holds true.
Ethos is a rhetorical device, which is used by the author in any form of literary composition. Ethos is used specifically in order to persuade the target audience, and convince them his or her emotions.
In the given situation, when the author mentions that the character of Wiesel is a Holocaust survivor, it adds an element of giving credible information to the audience about Wiesel with the addition of ethos.
Hence, option B holds true regarding an ethos in the given condition.
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