Before the 12th century monk and nuns were usually taken from the Aristocracy. The aristocracy comprises a highest classes in society, mostly included people of noble birth who were holding hereditary title and offices.These people were of higher rank in the society.
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9/11 was caused by al-qaeda/ bin laden and The attacks killed 2,996 people, injured over 6,000 others, and caused at least $10 billion in infrastructure and property damage.
Explanation: