Which reason for trade barriers is being used when the us refuses to trade with another country because they use child labor to manufacture goods? national security upholding standards protection of us jobs protection of us markets

Pls quickly! which of the following statements about spanish plantations is not accurate? a. spanish plantation screw sugarcane for export to spain. b. the spanish had a little concern for the lives of the indians who worked on the plantations. c. spanish presentation grew a wide variety of crops and sent the produce to many different european countries. d. to replace the native americans our dying off the spanish important african slaves.