Answer: D
Item D, the invention patent can be authorized only after preliminary examination and substantive examination, and accordingly there are two disclosures. The first time is the announcement of the patent application: after the patent administration department of the State Council receives the invention patent application and determines that it meets the requirements after preliminary examination, it will be announced 18 months from the date of application. The patent administration department of the State Council may publish the application as early as possible upon the applicant's request. The second time is the patent authorization announcement: if no reason for rejection of the invention patent application is found after substantive examination, the patent administration department of the State Council will make a decision to grant the invention patent right, issue an invention patent certificate, and register and announce it at the same time. The invention patent right shall take effect from the date of announcement. After preliminary examination and authorization, utility models and designs can only be disclosed once, that is, authorized disclosure.