Answer: a. United Nations
Step-by-step explanation:
The United Nations was established primarily to keep the peace in the world through the use of dialogue amongst nations to lay aside their grievances as well as cooperate in moving the planet forward. It also does a lot of humanitarian work to care for the most vulnerable groups in the world.
This means that even though there are organizations created by the UN to improve trade such as the United Nations Conference on Trade and Development (UNCTAD), the mandate of the UN in general is such that it cannot be said to have contributed to the rise of export activity in the world economy.