The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
The students / and the teachers / worked hardly / to make the event a success.

Correct option is B

Option (b) contains an error.
Explanation: “Worked hardly” is incorrect. The correct phrase is “worked hard.”
“Hardly” means barely or scarcely, which changes the meaning.
Grammatical Rule Used:
Use “hard” as an adverb to mean putting in great effort.
Example: She worked hard to achieve her goals.
Information Booster:
· Hardly (adv.) = scarcely, almost not.
· Hard (adv.) = with a lot of effort.