Answer:
d. decrease, and U.S. net capital outflow increases.
Step-by-step explanation:
Yuan is the currency of the country China and the currency of United States of America is dollar. Every country in the world does imports of some goods to meet the demands of the country and exports some items to the other countries that is produced in abundance in the parent country. In this way, countries earn huge capital by doing importing and exporting.
In the context, China will buy scrap metal from United States, thus China is importing a good from U.S. So China will have more of import. Hence China net export will decrease. While U.S. is selling goods to China in exchange of dollar and earning capital. So, net capital outflow of the United States will increase.