Sentence Improvement - Verbal and Reasoning

Directions to SolveIn questions given below, a part of the sentence isitalicised and underlined. Below are given alternatives to the italicised part which may improve the sentence. Choose the correct alternative. In case no improvement is needed, option 'D' is the answer.
Q1:

We were not the wiser for all this effort to explain the case to us.

A none

B neither

C nevertheless

D No improvement

ANS:A - none

No answer description is available.