Which Is True About Wages in America

Which is true about wages in America?

A) Wages in the U.S. are no higher than in most foreign countries.
B) Wages in the U.S. are high because productivity is high.
C) Wages in the U.S. are high; therefore, U.S. firms must be operating with high costs.
D) High wages in the U.S. would mean that it would not be advantageous to the U.S. to trade with other nations.