Choose the correct part of speech for the highlighted word in each sentence.
The detective carefully examined the mysterious document.

Correct option is C

The correct option is (c).

The highlighted word carefully describes how the detective examined the document. It modifies the verb examined, so it is an adverb.

Step-by-step reasoning:

• Identify the verb: examined.
• Ask: How did the detective examine? Answer: carefully.
• A word that modifies a verb by telling manner is an adverb.

Why other options are incorrect:

• (a) Adjective would modify a noun (careful detective), but carefully modifies the verb.
• (b) Verb is an action/state word; carefully is not an action.
• (d) Noun is a naming word; carefully is not a noun.

So the correct answer is (c)