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The period between 499 and 1066 in England was the time of frequent warfare, early mortality, and significant suffering.
Answer: B
Explanation
The period between 499 and 1066 in England is the Dark Ages or Anglo-Saxon period.
Many historians call it 'early medieval period'.
This era started with the Roman rule in British withdrawing with the onset of settlers from other regions.
Of them, German-speaking Anglo-Saxon dominated.
They spread throughout receiving no resistance from the residents.
The rule came to end in 1066.
C.
Most civilizations that thrived for long periods of times expanded into surrounding territories.