Which one of these is NOT an example of using market mechanisms to influence working conditions in low income countries.

Selling shares in a company that has been found to have terrible working conditions in its factories.

Buying goods from a company that has signed on to a code of conduct to protect labor conditions and hires independent insepectors to ensure the conditions are met.

Passing a national law in the United States to ban the import of cotton from Xinjiang province in China because of the fear that it is produced with forced labor.