Which of the six principles of the Constitution do you believe should be is the most important and why? Which principle do you believe should be emphasized more? Defend your position.

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:

a. by accepting the election of president abraham lincoln in 1860 and convincing other southern states to do the same

wheres the poem i cant need more info