Form the adverb of the following word:
sharp
An adverb is a word or phrase that qualifies or changes an adjective, verb or another adverb, to express a relation of a situation, cause etc.
The correct answer is A)sharply as it ends in 'ly' and is spelled correctly.
Options B,C, and D are wrong as 'sharper' is a comparative adjective, 'sharpest' is a superlative adjective, and 'sharpen' is a verb respectively.