From the words or group of words lettered A to D, choose the word or group of words that best completes the sentence below. Since the opposing parties could...

Answer Details

The word that best completes the sentence is "broke down." When negotiations or discussions fail to produce a result or agreement, we use the phrasal verb "break down." Therefore, the sentence means that since the opposing parties couldn't agree, the peace talks failed or collapsed, and were unable to continue. Option A, "broke up," could also be used in the context of the sentence but would imply a less amicable end to the talks, whereas "broke down" suggests a failure due to disagreements or other reasons. Option C, "broke through," would be used in the context of overcoming an obstacle or resistance, while option D, "broke out," would be used to describe a sudden occurrence of something like violence, war, or a fire.