What change did not happen in most eastern europe countries with the end of the cold war

D. Citizens showed a renewed interest in communism.

Explanation:

When Gorbachev took power in 1985, he introduced two important policies: glasnost and perestroika. These policies relaxed the rules of the USSR. It allowed more western ideas and good to enter the country. It also allowed a small level of market incentives to citizens. In the next few years, the Cold War ended. However, despite this changes, the population did not seem to gain a renewed interest in communism.

your answer would be a) no nation can be economically self-sufficient.

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a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.