was most important to her，she told me，was her family.A. ItB. ThisC. WhatD. As

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A. It
B. This
(答案→)C. What
D. As
解析：句子的主干为“     was most important to her was her family”，很明显这里的主语是一个句子，所选的词既引导主语从句，又在从句中作主语，所以应选择what。she told me为插入语。