What larger era was the Europe dark ages a part of and the years of that larger era

Migration period, the early medieval period of western European editors oversee subject areas in which they have extensive knowledge, whether from years of Migration period, also called Dark Ages or Early Middle Ages, the early medieval the idea arose of Europe as one large church-state, called Christendom

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explanation:

there are two statements that are incorrect.

1. the marshall plan was a lend lease program. it was an economic plan that europe redevelop itself after wwii.

2. einstein didn't really do anything to further the allied cause in building the bomb. he merely sent a letter to fdr telling him (in 1939) that if the united states entered the war, perhaps it would be wise to build the bomb before germany did. i would say this answer is incorrect, but when america entered the war 2 years later, fdr thought it might be a good idea to take einstein's advice.

the 4th choice is definitely so wrong that is likely the single answer of this question

electricity

so thats all folks