The creation of separate quality departments in the early 1900s caused: indifference to quality among workers and their managers. upper management to be more knowledgeable about quality. no effect on the quality of the products the customer received. production efficiency to decline

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:

you should just come up with the best answers you can nobody is perfect.

explanation: i just want to