Select the most appropriate option to substitute the highlighted segment in the given sentence. If no substitution is required, select ‘No substitution’.
The crisis was averted due to timely intervention by the government.

Correct option is C

The correct answer is (c) No substitution required.
Explanation:
· The sentence is grammatically correct in simple past passive voice.
· “was averted” is correct to describe a past event (the crisis was prevented).
· “due to timely intervention” gives reason and is also correct.
Structure Used:
· Passive form in simple past: was/were + V3
· “Due to” is followed by a noun or noun phrase
Example:
The fire was extinguished due to quick action.
Why other options are incorrect:
· (a) was been averted – grammatically incorrect construction
· (b) be averted – not suitable for past narration
· (d) is avert – incorrect tense and form