Can you find a better way _____ he can be persuaded to give up smoking?

Can you find a better way _____ he can be persuaded to give up smoking?

A.because

B.while

C.in which

D.where

答案及解析： C

解析：

way做先行词时，定语从句用that／in which或省略关系代词来引导定语从句。