Why was the Republican Party formed? to give more power to the federal government
to give less power to the federal government
to oppose the spread of slavery
to promote the spread of slavery

its B

Explanation:

its right on Edge2020

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: