The root would be mal, which means, “bad” or “evil”
Root, I believe. Next time, add your choices though, to make it easier :3
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The three musketerrs were also referred to as A. the libertines.
I believe the answer is C.) When the teacher attempted to discipline him, he was obstinate.
Obstinate means; “Stubbornly refusing to change ones opinions or chosen course of action, despite attempts to persuade one to do so.” The sentence states that the teacher is trying to discipline the boy, but he refuses to.
I hope this helps :))