Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.
Answer: D. quickly
The correct answer is D. quickly.
Quickly is an adverb, which is used to describe how an action (the verb "fixed") was performed.
Adverbs of manner are typically formed by adding "-ly" to an adjective.
Quick (A) is an adjective, which describes a noun (e.g., "a quick fix"), not a verb.
Quickness (C) is a noun, referring to the quality of being fast, rather than the action itself
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