Refer to Jonathan's and Yeani's Student Story in the chapter. What advice do Jonathan and Yeani give to couples trying to make things work while in college?

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.

the answer your looking for is c. : )

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