一道关于状语从句的题

问题描述:

一道关于状语从句的题
This is a very interesting book.I'll buy it,_______
A.how much may it cost
B.no matter how it may cost
C.however much it may cost
D.how may it cost
我想知道为什么

b因为觉得好所以是无论多贵都要买,而且这里应该用陈述语序