Concept:An antonym is a word opposite in meaning to the given word, and the correct choice must also fit grammatically and logically in the gap.
Explanation:The underlined word is “conciliatory”, meaning intended to pacify, calm, or bring peace to a disagreement.
It suggests a gentle, soothing, or appeasing attitude.
The opposite idea would be a word that describes an aggressive, hostile, or argumentative manner.
Option C, “confrontational”, exactly conveys this opposite meaning.
A confrontational person is ready to face conflict or provoke a fight, which is the direct reverse of being conciliatory.
The other options do not fit as opposites: “controversial” relates to causing debate, “rational” means logical or sensible, and “forceful” means powerful or assertive, not necessarily aggressive in a conflicting way.
Thus, only “confrontational” provides the required contrast and completes the sentence correctly.
Answer:C. confrontational