A part of the following sentence is highlighted . Choose the option that can replace the underlined part to improve the sentence. If you feel Options A, B, or C do not improve the sentence, then choose Option D: "No improvement required."
The employees, having completing the rigorous training program, felt well prepared for the upcoming challenges.

Correct option is C

The correct option is (c).

Explanation:
The correct substitution is Option (C). The original phrase "having completing" is grammatically incorrect. It should use a Perfect Participle structure: 'Having + Past Participle (V3)'.

Grammatical rule used:
A Perfect Participle (Having + V3) is used to indicate an action that was completed before another action in the past. The correct form is 'Having completed'. Option C also places the modifier correctly at the beginning for better flow.

Example:
Having finished my homework, I went out to play.

Information Booster:
Participle phrases must refer clearly to the subject of the main clause. In Option C, 'Having completed...' correctly refers to 'the employees'. So the correct answer is (c)