Question

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

Answer 1

The reason for trade barriers is being used when the US refuses to trade with another country because they use child labor to manufacture goods is upholding standards. 

I hope this helps!

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Answer 2

upholding standards

They want to show that they believe that child labor is wrong, and so the US refuses trade with another country because they use child labor

if they do not uphold standards, they can choose to get manufactured goods from another country (especially for cheaper prices)

So upholding standards is your best answer

hope this helps