In the question given below, a part of the sentence is in bold and italicised. Below are given alternatives to the bold and italicised part which may improve the sentence. Choose the correct alternative. In case no improvement is needed, choose option 'D' as the answer.
During his long discourse, he did not touch that point.
touch upon
touch on
touch of
No improvement
Correct answer is B
No explanation has been provided for this answer.