The first 10 amendments were added to the Constitution before it was
ratified. These amendments guarantee many basic American personal
liberties and are together known as

A. The Federalist Papers

B. The Ratifiers
C. The Bill of Rights

D. The Personal Liberty Amendments

a system in which products were made rapidly by machines

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: