What revolutionize farming /agriculture practice in medieval europe?

During Medieval Europe, farmers built Water Mills and Sawmills for both timber and stone. A lot of the tools they used were also water-powered. Things like this helped their building techniques into creating better tools for their seasonal rotation of farming.

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:

b. 155 enlisted men and no officers