Which of the phrases given below the sentence should replace the phrase printed in bold type to make it grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.

Can you tell me why did you not speak the truth?

A.

why did not you speak

B.

that why did you not speak

C.

why you did not speak

D.

why did you not spoke

E.

No correction required

Correct answer is C

No explanation has been provided for this answer.