The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
That accident happened [A] / a long time ago, but [B] / I have shivered at [C] / the thought of it ever for [D].

Correct option is A

Option (a) D contains an error.
Error Explanation:
· The phrase "ever for" is incorrect. The correct phrase should be "ever since".
· "Ever since" is used to indicate something continuing from a past point in time.
Corrected Sentence:
"That accident happened a long time ago, but I have shivered at the thought of it ever since."
Grammatical Rule Used:
· "Ever since" is a fixed phrase that means "from that time until now."
· Example: I have been working here ever since I graduated.