(A) Verb
(B) Pronoun
(C) Adjective
(D) Adverb
🧠 Explanation:
- In the sentence, “well” describes **how** the action “doing” is being performed, which is the role of an adverb.
- Adverbs modify verbs, adjectives, or other adverbs — in this case, it modifies the verb phrase “are doing.”
- “Well” is commonly used as an adverb to indicate a high standard or good performance.
- Example: “She sings well” — here too, “well” describes the manner of the action “sings.”