Final answer:
The primary role of UNCITRAL is to promote trade disputes among nations by developing and harmonizing international trade law, providing legal guidance, and facilitating negotiations between countries.
Therefore, option C is correct.
Step-by-step explanation:
The primary role of UNCITRAL (United Nations Commission on International Trade Law) is to promote trade disputes among nations. UNCITRAL works towards developing and harmonizing international trade law by creating standards, providing legal guidance, and facilitating negotiations between countries. An important aspect of its work is the promotion of the rule of law and the resolution of trade disputes in a fair and predictable manner. UNCITRAL helps establish a stable and secure trading system by encouraging countries to follow agreed-upon legal principles and procedures in resolving their trade conflicts.