Byzantium/Constantinople was conquered in 1451, but the empire continued to decline starting around the 18th or 19th centuries. It officially died in WWI. As for how long it was a major threat to Europe, the empire's prime was the 16th century, under Suleiman the Magnificent.
<span>The so-called Dark Ages were a giant economic Depression which lasted 300 years - and the only way you could survive was out scratching any kind of food out of the soil. But by Medieval times, things were more organized, and people could afford to live in town. There were various jobs - each person no longer had to do everything needed for survival. People could share the things they made and still live.
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the answers is C because the Egyptians think when people die there is a afterlife where you continue living so they put everything important in there like money the Egyptians though if they didn't get buried properly then they would die and don't get to live a cool afterlife