Which of the Following Statement(s)is/are True Concerning the Montreal Protocol

Multiple Choice

Which of the following statement(s) is/are true concerning the Montreal Protocol on Substances that Deplete the Ozone Layer?

A) The United States,Mexico and Canada signed it.
B) It was not signed by the United States but was signed by 23 other countries.
C) It is a treaty that requires all signatories to reduce their production and consumption of all chemicals.
D) It is a treaty that requires all signatories to reduce their production and consumption of only CFC's.