Which of the Following Is a Valid Counter-Argument to the Call

Which of the following is a valid counter-argument to the call for higher tariffs to save U.S. jobs?

A) U.S. firms and workers must be protected from the cheaper labor in nations where wages are low
B) All nations cannot simultaneously succeed in restricting imports while maintaining exports
C) Reducing tariffs will benefit all consumers and domestic producers
D) The need to protect U.S. workers from the unemployment is not a concern in international economics