Arrange the following in a chronological order.
A. Kyoto Protocol
B. Copenhagen Summit
C. Earth Summit at Rio
D. United Nations Environment Programme
Choose the correct answer from the options given below:

Correct option is C

​​Introduction: 

The chronological order of the listed environmental agreements and organizations is determined by their respective founding or adoption dates:

Additional Knowledge:

• United Nations Environment Programme (UNEP): Established following the Stockholm Conference (United Nations Conference on the Human Environment) in 1972, it is the leading global environmental authority that sets the global environmental agenda.
• Earth Summit at Rio:UNCED1992Convention on Biological DiversityUN Framework Convention on Climate Change (UNFCCC) Officially the United Nations Conference on Environment and Development (), held in , which led to key agreements like the and the .
• Kyoto Protocol: An international treaty adopted in 1997 under the UNFCCC, which set binding emission reduction targets for developed countries.
• Copenhagen Summit: This refers to the 15th Conference of the Parties (COP 15) to the UNFCCC, held in 2009, which aimed to establish a framework for climate mitigation beyond the Kyoto Protocol's first commitment period.

Information Booster: 

The UN Framework Convention on Climate Change (UNFCCC) was opened for signature at the 1992 Earth Summit, and both the Kyoto Protocol and the Copenhagen Summit (COP 15) are part of the process and meetings held under the umbrella of the UNFCCC. The UNFCCC itself came into force on March 21, 1994.