The answer is A, because they didn't know what metal was?
Answer:
America is named after Amerigo Vespucci, the Italian explorer who set forth the then revolutionary concept that the lands that Christopher Columbus sailed to in 1492 were part of a separate continent
Explanation:
The western empire had lost most of its political, religious, and economic power
Because they managed to lost the power to use their original language and replaced by another
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What is in common with Mongols, White Huns, and the Mughals as well was that all of them were persecuting Buddhists along their conquests on either Europe or Asiatic soil. None of the mentioned civilizations were particularly fond of the buddhistic teachings.