An unruly act doesn't really break any law but it is offensive. An example would be resisting against the authorities which can cause trouble and get you arrested but not really cause jail time. D is the correct answer most likely.
The russians practiced communism where as the west (usa,britain,france) were anti communist. the us were capitalists , thus is would make sense that the ussr and the usa would clash eventually despite their pasts of helping eachother out. once russia clashed with the west it gave way to the cold war
According to quiz-let, the answer is now ending isolation from its isolation from "Europeans hermit". So I would choose B.
