The answer is A and D
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C protagonist, because a foil is someone who contrasts greatly from the protagonist to highlight some of the protagonists characteristics, and the antagonist is basically a villain. Not many in an audience will sympathize with a villain, so the answer use be the protagonist, or the hero that faces obstacles and eventually overcomes them.
Just as dragon wings is ready, black dog takes wind riders and moon shadows savings.
Im sorry but try to look this up