Mark ________ have hurried. After driving at top speed, he arrived half an hour early.[    ]

A. needn't  

B. wouldn't

C. mustn't  

D. couldn't

对拆迁居民因拆迁重新购置住房的，对购房成交价格中相当于拆迁补偿款的部分免征契税，成交价格超过拆迁补偿款的，对超过部分征收契税。 ( )