Which requirement is a written qualification for president of the united states?
a) the candidate must be a political party member.
b) the candidate must be a native-born american citzen.
c) the candidate must have college or university degree.
d) the candidate must have previous political experience.

B. The candidate must be a native-born American citizen.

Explanation:

As directed by the Constitution, a presidential candidate must be a natural born citizen of the United States, a resident for 14 years, and 35 years of age or older. These requirements do not prohibit women or minority candidates from running.

Explanation:

B) The candidate must be a native-born American citzen.

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.