Concept:The task asks for the word that is closest in meaning to the underlined word in the sentence.
Explanation:The underlined word is “reluctant,” which means feeling hesitation or not wanting to do something.
The correct answer must reflect the sense of being unwilling or hesitant.
Now look at each option:
“Adamant” means firm and unyielding, which is not the same as hesitant.
“Slow” refers to low speed or movement.
“Sluggish” means lazy or slow-moving.
Only “unwilling” clearly matches the meaning of “reluctant.”
Therefore, the nearest in meaning is “unwilling.”
Answer:D. unwilling