According to their nature, international intellectual property treaties can be divided into three categories: first, treaties that provide substantive intellectual property protection, such as Paris Convention and Berne Convention; Second, treaties that are conducive to the protection of intellectual property rights in many countries, such as the Patent Cooperation Treaty, the madrid agreement concerning the international registration of marks (hereinafter referred to as the Madrid Agreement) and the Budapest Treaty on the International Recognition of the Preservation of Microorganisms Used in Patent Procedures (hereinafter referred to as the Budapest Treaty); Third, treaties establishing relevant international classifications, such as Nice Agreement on International Classification of Goods and Services Registered with Trademarks (hereinafter referred to as Nice Agreement) and Vienna Agreement on Establishing International Classification of Graphic Elements of Trademarks (hereinafter referred to as Vienna Agreement).
Option D should be The Hague Agreement on the International Protection of Industrial Designs.