International convention on "testing ground"; right of priority
The objects protected by the Paris Convention for the Protection of Industrial Property include invention patents, utility models, industrial products, trademarks and names of manufacturers. Article 4, paragraph A- 1, stipulates:' A person who has formally filed an application for the registration of an invention patent, utility model, industrial product model or trademark in a member country of the Union or his successor shall have priority when filing the same application in other member countries of the Union within the following period. The priority stipulated in this article only applies to invention patents, utility models, industrial appearance styles and trademarks (trademarks in this Convention only refer to commodity trademarks, excluding service trademarks). It can be concluded that D is right and ABC is wrong.