The Crusades is a possible answer. They paved the way for much cultural transmission. Trading can be another possible answer.
Helen Keller suffered from both A and C
The industrial revolution was a time of great age throughout the world. it represented major change from 1760 to the period 1820-1840. the movement originated in great Britain and affected everything from industrial manufacturing processes to the daily life of the average citizen. i will discuss the industrial revolution and the affects it had on the world as a whole. sorry i couldn't finish it