💡 Detailed Explanation
The correct answer is 決裂 (ketsuretsu), which means 'breakdown' or 'rupture,' and is specifically used for negotiations or talks that fail to reach an agreement. 分裂 (bunretsu) means 'split' (like a political party). 破裂 (haretsu) means 'to burst' (like a balloon). 断絶 (danzetsu) means 'severance' or 'break-off' (like diplomatic relations), but 決裂 is the most common and natural term for failed negotiations.