A. THE SOVIET UNION is the country that turned down U.S. offer of economics assistance in the Marshall Plan.
The Soviet Union refused the offered aid for the reason that accepting the Marshall Plan would constitute too much foreign interference in their Soviet economy.
The Marshall Plan was created as an American initiative to aid Western Europe after the World War II. This aid will be given after the fulfillment of their set conditions. The conditions were: each country must lay out a four-year plan that explains the procedures the country has to undergo for the intended economic transition; their government must also set aside "counterpart" funds subject to the spending discretion of the U.S. administrators.