Please I need help Why and how was the train the most effective both during and after the civil war? use evidence and cite your source

5-8 sentences

ill give more points for correct answers

during civil war train is more effective because people can move one country to another country

people can eat food during that time

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: