In the aftermath of the Cold War, international relations between Cold War allies became more difficult.
Statements
Countries that were allies during the Cold War found it more difficult to have international relations after the Cold War.
There were tensions between these former allies that had previously been overlooked, so now leaders of these nations had to conduct tactful economic negotiations.
Evaluate / Goal
These proposition / generalization versions of Most Supported like to express a "moral to the story", but we want to be cautious about picking something too strongly worded.
Since the story tells of two timeframes with some differences, the correct answer may try to "explain one Difference using another Difference".
During Cold War After Cold War
X, Y, and Z were allies Not technically allies
tensions overlooked tensions not overlooked
int'l relations between int'l relations between XYZ less difficult XYZ more difficult (tactful negotiations)
Let's look for an answer that safely reinforces that being Cold War allies was a causal difference-maker that allowed these countries to overlook tensions and have easier international relations.