选项
A.
A.Tariffs
B.
B.Credit portfolios
C.
C.Local content requirements
D.
D.Administrative policies
正确答案：
名词解析
Trade policy uses seven main instruments: tariffs, subsidies, import quotas, voluntary export restraints, local content requirements, administrative policies, and antidumping duties. Tariffs are the oldest and simplest instrument of trade policy.