Which of the Following Statements About the Montréal Protocol Is

Which of the following statements about the Montréal Protocol is TRUE?

A) The United Nations set a standard for phasing out ozone depletion, and each country must follow this standard.
B) It is administered by the United Nations and outlines a series of deadlines for cutting back production of CFCs.
C) All developed nations are required by the United Nations to participate in the Montréal Protocol due to the serious global nature of ozone depletion.
D) The United Nations stated that no amendments can be made to this protocol.
E) Once a developing nation has a per capita income of greater than $20,000, that country is mandated to come into compliance with the Montréal Protocol.