单项选择题

A company paid $500，000 in merit raises to employees whose performances were rated A，B，or C．Each employee rated A received twice the amount of the raise that was paid to each employee rated C；each employee rated B received
times the amount of the raise that was paid to each employee rated C．If 50 workers were rated A，100 were rated B，and 150 were rated C，how much was the raise paid to eachem ployee rated A？（）

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