There would have been trading posts or marketplaces along the way to the city of

the religious center of the Arab world. Many people would
be traveling to this city on a pilgrimage, one of the things
required for a person who practices the Islamic faith. One
of the most important things Arab people traded was
information. Especially once the official language was

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:

the answer is "focused on"

lol gave an answer 1 week that's the answer for those who need it in the future xd

hey i did something like that before, what is the quesiton?

the option which was not a function of missionaries in the northwest was the first one - they established posts for trading furs and other goods.

missionaries were sent around the world to spread religion and their knowledge and others - they were not merchants who sold furs and other goods.