______ Tom remains modest and is willing to accept suggestions from others.A．However his
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______, Tom remains modest and is willing to accept suggestions from others.
A．However his notable contributions
B．His making notable contributions
C．For all his notable contributions
D．Instead of his contributions
请帮忙给出正确答案和分析，谢谢！
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正确答案：C
让步状语从句用法。forall结构可以用来引导让步性短语，或跟that从句，表示“尽管，虽然”.insteadof跟动名词用作句首状语时，一般表示“不是……而是……”，不合句意。however可以用来引导让步性状语从句，但不能直接跟名词或动名词，如在本句中应为howevernotablehiscontributions(are)。因此答案为C。