A.Africa
B.Eastern Europe
C.Asia
D.The New World
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A.landlords
B.tenants
C.farmers
D.wage laborers
A.Use of artificial fertilizer.
B.Introduction of new agricultural machinery.
C.The'Open-field'system.
D.A system of crop rotation.
A.The open field system provided a good opportunity to experiment.
B.The open field system wasted land.
C.The open field system was wasteful of labor and time.
D.The open field system made livestock farming difficult.
A.4th
B.5th
C.6th
D.7th
A.the rich clergy
B.the lawyers
C.the landowners
D.the town traders
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