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:

During his long discourse, he did not touch that point.

A touch upon

B touch on

C touch of

D No improvement

ANS:B - touch on

No answer description is available.