In each of the questions given below, four words are

Solution

The phrase “promote mutual understanding” is correct, but “protect long-term cooperation” is slightly illogical. Instead, negotiators should protect mutual understanding and promote cooperation. Thus B and D must be swapped. Correct structure: Negotiators must carefully balance national interests while attempting to protect mutual understanding so that peace agreements can preserve regional stability and promote long-term cooperation. Option Analysis A – Creates unnatural phrases. B – Correct swap between promote and protect. C – Distorts the sentence meaning. D – Creates incorrect expressions. E – Incorrect because improvement is needed.