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

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

A) The United States and 23 other countries 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.
E) Both (a) and (c) .