Concept:Choose the phrasal verb that correctly describes a failure or collapse of talks.
Explanation:The opposing parties could not agree, so the peace talks stopped working properly.
The phrasal verb "break down" means to fail or collapse, especially in negotiations.
"Break up" means to separate or disperse, like a meeting.
"Break through" means to make a sudden advance past an obstacle.
"Break out" means to start suddenly, such as a war or disease.
Since the talks could not continue because of disagreement, the correct expression is "broke down".
Answer:B. broke down