C. west africa is the correct answer
The Black Death was a plague that started in Central Asia in 1338 then it reached to China in 1346 One false rumor was that the moguls started it which was not true It affected the Black Sea port by 1347. It killed from 75 to 200 million people. Then Europe was a victim of The Black Death 1346 and lasted until 1353. Cracow and Poland were not affected by the Black Death.
An government revenue can be increased by doing their job correctly and helping the country stay running
Powhatan, Pocahontas's father
Historically, the caliphates were polities based on Islam which developed into multi-ethnic trans-national empires. During the medieval period, three major caliphates succeeded each other: the Rashidun Caliphate (632–661), the Umayyad Caliphate (661–750), and the Abbasid Caliphate (750–1258).