Epistemology is the study of the origins of language
knowledge
the nature and structure of reality
the foundations of human behavior
All of the above

knowledge

Explanation:

Epistemology studied how humans eventually come to the conclusion that a certain information can be considered as 'knowledge'.  It emphasize the behaviors that humans tend to do in order to seek truth and justification.

Epistemologist would be interested in finding out how  people in the fast believe a certain information as a 'Fact' compared to the people in modern would.

In the past, most information that is given by popular religious institutions would most likely be considered as a 'knowledge' By the public.  This might not be the case for modern societies who have higher tendencies to obtain hard evidence before consider a certain information as a knowledge.

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