Answer: B
For item B, a patent must go through the statutory review process of a statutory body before it can be granted. It is not automatically obtained after invention. After the patent is granted, if someone thinks that the patent is improperly granted, the law also sets up a special rights confirmation mechanism, that is, the patent invalidation request review process initiated by a specialized agency initiated by the requester. The exercise of patent rights requires disclosure of the patent application authorization content as a necessary condition. Copyright is automatically acquired from the date the work is completed.