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Serf
My guess would be b but im not to sure hope this helped
Answer:
Market economies utilize private ownership as the means of production and voluntary exchanges/contracts. In a command economy, governments own the factors of production such as land, capital, and resources. Most nations operate largely as a command or market economy but all include aspects of the other.
Explanation:
Great Britain and the British Empire except Scotland started in 1752 and they adopted the Gregorian calendar and 1952 also
I believe through conquest and colonization
