The soviet union believed that open markets represented a threat to their political and strategic interests; thus, it established a political and economic border between eastern and western europe that became known as the

a plantation economy is an economy based on agricultural mass production, usually of a few commodity crops grown on large farms called plantations. plantation economies rely on the export of cash crops as a source of income.

i hope this : )

the answer would more than likely a.)falling crop prices  

hope the answer is right and ,either way have a nice day.

d. islands off the coast of newfoundland