Help with both plz

9. What was the most popular method of the U.S. protecting its industries? A. tariff O B. quota C. licenses D. embargo 10. Which of the following is NOT a reason to ban trade, according to the reading? A. Avoid oversupply of cheap foreign products forcing domestic producers to lower their prices B. Avoid competition of low pay for foreign workers or recognition of a foreign brand! C. Avoid drops in market demand because of quality, safety, or ethical concerns arising from foreign products. D. To save money on shipping costs and fuel costs