What is the most likely reason it was difficult to pass laws under the articles of confederation

no power to regulate commerce or trade between state.

answer; i believe that the correct answer is ; unified

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.