Explanation
The World Trade Organization (WTO) was established on January 1, 1995.
The WTO is an intergovernmental organization that regulates international trade between nations. It provides a framework for negotiating and implementing trade agreements, and it operates a system of rules and procedures for resolving disputes among its member countries. The organization is headquartered in Geneva, Switzerland, and currently has 164 member countries.
Thus, the correct answer is C: 1st January, 1995.