Which Is a Valid Counterargument to the Call for Higher

Which is a valid counterargument to the call for higher tariffs to save U.S.jobs?

A) Nations adversely affected by such tariffs are likely to retaliate,causing a costly trade barrier war.
B) U.S.firms and workers must be shielded from the competitive practices of foreign businesses.
C) Strategic trade policy calls for trading nations to erect trade barriers so that they will have the same competitive conditions.
D) They are needed to protect U.S.workers from poor enforcement of labor standards in other nations.