Answer:
The correct answer is C. The United Nations has taken on the task of conducting research on the effects of climate change.
Step-by-step explanation:
The United Nations Framework Convention on Climate Change (UNFCCC) was adopted in New York on May 9, 1992 and entered into force on March 21, 1994. It allows, among other things, to strengthen public awareness on a global scale, of the problems related to climate change.
In 1997, governments agreed to incorporate an addition to the treaty, known as the Kyoto Protocol, which has stronger and legally binding measures.