Karl Marx called religion the "opiate of the masses.” This statement reflects his belief that religion was: A. useful in a productive society.

B. numbing and used to mask problems.

C. sacred and should be protected by the government.

D. evil and should be illegal.

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:

it increased the power of the king of england.