Select the most appropriate option to improve the underlined segment in the given sentence. If there is no need to improve it, select ‘No improvement’.
He didn't explain a great deal concerned the scheme though he spoke for a long time.

Options

A. a great deal as concerning as the scheme
B. No improvement.
C. a great deal concerning the scheme
D. a great deal to be concerned the scheme

Answer

C

Explanation

a great deal concerning the scheme. Here, the main verb is "explain" and the sentence is in present continuous tense so the verb of concern must be changed to a gerund to make it a suitable phrase.