Trademark rights belong to intellectual property rights. It is a property right in a broad sense, with the property of property right, but its object is intangible property, and the object of beautiful property right is tangible property, that is, specific things. This is the difference between the two. Trademark right has the characteristics of world right (absolute right) and domination, so item A is correct; The right of set-off is the right of formation, not the right of claim, so item B is wrong; The exercise of the right of defense must be based on the existence and request of the right of claim, and it will disappear with the elimination of the right of claim. So item c is correct; The name of an enterprise is an exclusive right, and the right to name is a property right, which can be transferred according to law, so item D is correct.