Philip is a handicapped individual who owns a unit in a large cooperative complex. Philip's unit is not currently handicap accessible. If Philip wants to make the unit handicap accessible, who is responsible for the cost of the accommodations...?

answer; proximity;

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.