Correct option is D
The correct answer is: (d) : C, B, E, D, A
Explanation
Here is the chronological timeline for each initiative:
(C) Vienna Convention (1985): The first global framework for the protection of the ozone layer.
(B) Montreal Protocol (1987): A landmark international treaty designed to protect the ozone layer by phasing out the production of numerous substances responsible for ozone depletion.
(E) Kyoto Protocol (1997): An international treaty which extended the 1992 UNFCCC that commits state parties to reduce greenhouse gas emissions.
(D) Copenhagen Summit (2009): Also known as COP 15, it resulted in the Copenhagen Accord, which recognized the scientific case for keeping temperature rises below $2°C$.
(A) Durban Conference (2011): Known as COP 17, it led to the establishment of the Durban Platform for Enhanced Action to negotiate a global climate pact by 2015.