Assertion (A): The United States of America has threatened to ask the World Trade Organisation (WTO) to apply sanctions against the developing countries for the no observance of ILO conventions. Reason (R): The United States of America itself has adopted and implemented those ILO conventions.

The correct answer is A because both statements are true and the reason accurately explains the assertion. Assertion A is true because the United States, along with several other developed nations, has historically pushed for a social clause in international trade agreements. They have argued that the WTO should be able to impose trade sanctions on countries that do not adhere to the core labor standards established by the International Labour Organization. This is often framed as a measure to prevent social dumping and ensure fair competition. Reason R is true because the United States has formally adopted and implemented the key ILO conventions regarding labor rights. Because the United States holds itself to these high labor standards, it uses its own compliance as a justification to demand that developing countries do the same. The logic is that if the U.S. incurs the costs of following these conventions, other nations should not be allowed to gain a competitive trade advantage by ignoring them. Therefore, R provides the rationale for the stance taken in A.