The Laissez Faire principle A. Was practiced by Jackson which led to the Panic of 1837.
B. Provided the government assist struggling businesses.
C. Added to the mounting criticism of Van Buren.
D. Was an element of the Monroe Doctrine.

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: