Read this passage
an eastem european dictatorship has invaded and
occupied a neighboring country. the president of the
united states tries to pressure the dictatorship to end its
occupation by banning the country from trading with u. s.
companies. u. s. alles follow the same policy, preventing
the dictatorship from importing a wide range of goods.
the country eventually gives in and ends the occupation
the use of which foreign policy tool is described in the passage?