关于一道英语单选题
It is going to be hard to ----his wife that they can not afford a new house.
convince
contain
conduct
confess
那是困难的;他的妻子;他们不可以支付那所住宅.
大概其的含义是他和他的妻子支付一所新住宅很困难吧..
可是应该选哪个呢,