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.
(The lack of food) hope this helps :/
Answer: A condition urged by many as a requirement for legitimate government: that the authority of a government should depend on the consent of the people, as expressed by votes in elections.
:)
It’s B ..................
Answer: Britain and France disputed borders in the Ohio River Valley.
Explanation: A is the correct answer.
