Answer:
Evidence.
Explanation:
Evidence is the concrete facts used to support a claim. ... Many arguments begin by treating something as a claim, try to prove it, and then, once they have proved it to the author's satisfaction, treat it as a fact to be used as evidence to support some new claim.
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It is option A. She gets really mad because nobody ever believes her.
Antonym
Explanation: the other moccasins were described as plain and the other were “adorned” with beadwork or decorated. Because of this description adorned is an antonym of plain