Which climate region is labeled with the letter a on the map above? a. humid subtropical b. mediterranean c. semiarid d. highlands

c

Explanation:

answer; self_ disclosure;

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.