Answer:
A. big
Explanation:
Answer choice A is used if the sentence stands alone and with no additional context. If Mike's sales accounts were being described in comparison to that of another person, however then B would be the most logical answer to this question.
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C.Biggest
because the sales accounts that mike have is the biggest not bigger
it is the jim crow laws as they are in the south
and it is about discrimination and segregation
B