this math problem is too difficuit .can you show me ( )

问题描述:

this math problem is too difficuit .can you show me ( )
A what to work it out
B what to work out it
C how to work out it
D how to work it out

D
有不明白的地方再问哟,祝你学习进步,更上一层楼! (*^__^*)what to work out 不可以吗A的意思不对.C的意思是怎么做出来合题意