The correct option is C Kigali Amendment
Under Montreal Protocol,1987 the Kigali Amendment was agreed to phase down HFCs(HydroFluoroCarbons). It was on 15th October 2016 under United States leadership, 197 countries adopted this amendment under the Montreal Protocol in Kigali, Rwanda. It came into force on 1 January 2019. Under this amendment, the member States promised to reduce the production and consumption of HFCs by more than 80% over the next 30years.