What was the purpose of the Marshall Plan? to help European countries recover economically from World War II
to support U. S. allies in Europe during World War II
to fund the redevelopment of the Balkan countries in the 1990s
to contain the spread of communist central economies in the 1960s

providing aid to Western Europe following the devastation of World War II

Explanation:

The Marshall Plan, also known as the European Recovery Program, was a U.S. program providing aid to Western Europe following the devastation of World War II. It was enacted in 1948 and provided more than $15 billion to help finance rebuilding efforts on the continent.

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)

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.