The islamic requirement to learn arabic: promoted literacy encouraged collaboration between scholars. unite the various ethnic groups of the islamic empires. all of the choices are correct.

what are local authorities doing to fix the problem

explanation: what are local authorities doing to fix the problem

the foundation of greek city-states: following the fall of the mycenaean civilization in the 10th century bc, the area surrounding the empire went through its own mini dark ages. answer and explanation

it increased the power of the king of england.