Choose all of the following that are nontariff barriers to trade that act to restrict imports. Correct Answer(s) a tax on imports levied at the border and paid by the importer Press Space to open "Buy American" laws that govern what federal, state, or local governments can buy Press Space to open quantitative restrictions (quotas) on goods imported Press Space to open regional trade agreements (RTAs) that allow members to bid for government procurement contracts in other member states Press Space to open Incorrect Answer(s)