Fill in the blank with the appropriate adverb out of the options given below:

He works ______ quickly than I do.

(A) much
(B) very
(C) more
(D) quite

Choose the correct answer from the options given below:

(C)

The correct answer is Option (3) → (C)

• The sentence is comparing how quickly he works in relation to I (me).
• In comparative sentences, we use "more" with adverbs that do not take the "-er" suffix.
• "Quickly" is an adverb, and its comparative form is "more quickly."

Thus, the correct sentence is: "He works more quickly than I do."