Q14- Which one is the answer? Thanks

QUESTION 14 The best way to achieve better environmental and labor standards in developing nations is to O 1 boycott the products of companies that appear to be violating the standards 2. prevent companies in developing nations from closing plants and moving them to poor countries O 3 rich countries should lower their tariff barriers to give greater access to the exports of poor countries O 4 poor countries should copy the standards of rich countries 5 negotiate strict standards in free trade agreements