The voting preferences of a group of 156 registered voters are tallied below.   Democrat Republican Independent Total Vote by mail 57 30 6 93 Vote in person 31 25 7 63 Total 88 55 13 156 If we choose a voter at random, are the events "the voter is a Democrat" and "the voter prefers to vote by mail" independent or dependent events? Group of answer choices a. dependent b. independent c. it is impossible to tell from the information given

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