Taobao has been placed on the U.S. Trade Representative office's blacklist of "notorious marketplaces" due to the website's sale of counterfeit products and violations of intellectual property rights. If this led the U.S. to enact trade restrictions on the import of specific products from China, which of the following would they likely site as a reason?

a.To protect national security

b.To equalize the nation's balance of payments

c.To protect the health of citizens

d.To protect domestic jobs