Answer:
22,000 years
Explanation:
rule.of thumb is add 2000 years. for example 2000 BC is 4000 years
The following rule of thumb may be helpful: to figure out how about many years ago any calendric age in years B.C. occured, simply add 2,000 years (for instance 2,000 B.C. = 4,000 years ago).
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Rule by a small group of people
C. growing leaves to warm up
