_____you may have, you should gather your courage to face the challenge.A. However a se

_____youmayhave,youshouldgatheryourcouragetofacethechallenge.

A.Howeveraseriousproblem

B.Whataseriousproblem

C.Howeverseriousaproblem

D.Whatseriousaproblem

根据句意“无论你有多么严重的问题，你都应该鼓起勇气面对挑战”，而however表让步时其顺序应是：however+形容词+主语+谓语。however做连接副词，相当于nomatterhow,后接形容词或副词，意为“无论、不管”，引导让步状语从句，其序为“however+形容词、副词+主语+谓语”。