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a

Explanation:

c and d can be proved false easily. The Articles failed due to a weak central government. Also, there was a proccess to appointing a President, which was purely through Congress. That means that the answer is a because there were no seperate branches before the Constitution was set it motion.

for the united states of america, 1945 to 1964 was a time of high economic growth and general prosperity. it was also a time of confrontation as the capitalist united states and its allies politically opposed the soviet union and other communist countries; the cold war had begun.

explanation: