Sentence Correction - Verbal and Reasoning

Directions to SolveWhich of phrases given below each sentence should replace the phrase printed inboldtype to make the grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.
Q1:

If you are thinking about investigation overseas, isn't it makes sense to find an experience guide?

A it is not making

B doesn't it make

C does it make

D is it making

E No correction required

ANS:B - doesn't it make

No answer description is available.