Her genuine love for you may what she has sacrificed (牺牲)to make you succeed. A. stand f

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A. stand for
B. count for
(答案→)C. account for
D. speak for
解析：考查短语辨析。stand for 代表，count for 有…的价值，account for 解释，speak for为辩护，句意：她对你真诚的爱可以解释为了是你成功她所牺牲的。所以选C。