What means did portuguese explorers use to establish trading posts in india, persia, and southeast asia? a. they signed agreements between the local rulers and the portuguese king. b. they worked with the native people to establish diverse colonies. c. they seized existing trading posts using force. d. they allied with muslim arabs against local rulers.

Portuguese explorers used to establish trading posts in India, Persia, and Southeast Asia:

C. They seized existing trading posts using force.

Portuguese explorers used existing trading posts and force to dominate India, Persia, and Southeast Asia.

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.