【正确答案】

【答案解析】The solution for the Prisoners' dilemma for each nation is arrived at as follows: Given that Italy complies with the agreement: Spain will get 7 billion if it complies, but 9 billion if it defaults. Therefore Spain should default. Given that Italy defaults: Spain will get 3 billion if it complies, but 5 billion if it defaults. Therefore Spain should default. Because Spain is better off in either case by defaulting, Spain will default. Italy will follow the same logic and reach the same conclusion.