Do you think is right

Do _____ you think is right _____ difficulties you may have.Do _____ you think is right _____ difficulties you may have.A. what,howeverB. that,whateverC. whatever,whoeverD. what,whateverthe key is Dwhy not B并且请分析下这个句子的成分和句意

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think是及物动词，后接宾语；句子的意思：无论遇到什么困难，都要做自己认为正确的事。