I don't know how to -------------the problem 单项选择 A work at B deal with C work for D deal t

B deal with
（A是从事于……
B是处理
C是为...效力）
how to后接动词原形可以排除最后一项。

b

B deal with 处理解决的意思 和how连用
how to deal with the problem 怎样处理这个问题

B