The events that led to the Montgomery bus boycott were set in motion- A. when MLK Jr. called for the boycott

B. when Rosa Parks refused to give up her set on a bus

C. before the Supreme Court handed down Brown v. Board of Education

D. after Congress passed the Civil Rights Act of 1957

monasticism. people often do monasticism in monasteries

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: