Answer: Option C
Answer: (c)Meaning: Escalate - Increase rapidly, Dampener - an object that reduces something, Abandoned - things that have been left “The testy exchange” refers to a conflict and does not after it is used to show that the conflict has not thrown a negative impact on the preparation for the summit. With this, we found that the blank requires a negative word that has not been thrown by testy exchange. Only two words are negative in the sentence i.e. Dampener and Abandoned. With an article just before the blank, we find that the blank requires a noun. “Abandoned” doesn’t fit for the blank as it is a verb and also, it starts with a vowel letter, and a vowel letter word isn’t written after article “a”.