Which of these officially repealed the Missouri Compromise? A. Compromise of 1850
B. Ostend Manifesto
C. Kansas-Nebraska Act
D. Dred Scott Case

C. Kansas-Nebraska Act

Explanation:

The Missouri Compromise was overturned in 1854 by the Kansas-Nebraska Act. It gave free white male inhabitants of the two regions the option of applying for admission as either a free or a slave state. Violence erupted in Kansas, delaying the state's entrance to the Union.

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:

ottoman, safavid and mughal all in order