Why did civilizations like mesopotamia eventually develop a system of writing?
what activities required recordkeeping?
describe the writing system of sumer.
what was the babylonian empire, and what was the purpose of hammurabi's law?
what conclusions may be reached about trade and writing in the mesopotamia civilization?

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: