Evidently Poor economic conditions are big negative factors in migration which are bad for birds causing pollution throughout the air so that is one of the options.Next A. would be correct because with more higher paying jobs people would make sure they do their best in which participating in their jobs.
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Lord of the manor or barons
All feudal land belonged to the king though nominally, who in turn leased it to the barons. the barons in turn had the peasants farming the land, and keeping part of the produce in return the lords would protect the peasants.
Answer:
C. limit their protectionism policies.