Why do you think ancient Greek and Roman learning
disappeared from the West?

Because in middle ages after the fall of Western Roman Empire years of turbulence led to lost of knowledge, which was not in a focus of barbaric rulers until the period of Charlemagne the Great. That is why in those dark ages we have lost many things that ancient scholars left us.

Explanation:

After Roman Empire collapsed in 476, many Barbaric kingdoms were created on its soil. Most of them didn't lasted that much, such as Kingdom of Vandals or Kingdom of Ostrogoths. Most of them loathed and destroyed the heritage of Roman Empire and that is why for centuries we have lost many important information on that period.

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:

good morning!

answer: francis bacon is well known for being the secont man to sail around the world. sir francis drake was the first englishman to sail around the world.

have a great day!