How did reagan's cold war strategy change after gorbachev took power?
reagan began to focus more on military buildup.
reagan agreed to ban some nuclear missiles.
reagan recommended a return to the détente policy.
reagan took a more aggressive approach to the cold war.

The nuclear arms limitation (SALT I and SALT II) came into affect in the early and late 70s. That would make that option not possible as Reagan was elected in 1980 and Gorbachev came into power in 1985. You could argue between the detente and aggressive choices. Reagan funded anti-communist groups across the world that could be considered aggressive but not that aggressive. Later on Reagan started to consider the idea of detente and I believe that would make that the best option.

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.