The Two-Country Model of a Tariff Shows That a Tariff

The two-country model of a tariff shows that a tariff by one country causes:

A) a transfer of welfare from producers to consumers in the importing country.
B) the exporting country to lose less welfare than its deadweight losses because it gains some welfare at the expense of the importing country.
C) a reduction in net welfare in the world equal to the deadweight losses in all countries.
D) All of the above.
E) None of the above.