Which of the following statements is true?

(A). The Patent Cooperation Treaty (PCT) is an international treaty on patent law that was finalized in 1970.

(B).  The Patent Law Treaty (PLT) is an agreement that was signed on June 1, 2005, in Geneva, Switzerland, by 53 States and the European Patent Organisation, an intergovernmental organization.

(C). The Strasbourg Convention, also known as the Strasbourg Patent Convention, is a multilateral treaty that was signed by Member States of the Council of Europe on November 27, 1980, in Strasbourg, France.

(D). The European Convention concerning the formal requirements for patent applications was signed in Paris on December 11, 1953.