Why do we see land pattern use, and who determines the patterns

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!

100% tortilla. it is the only possible answer

The answer is d. none  hope this .