The following specific projects that do not grant patent rights are (). A. scientific discoveries B. intellectual rules C. drug manufacturing methods D. animal varieties

Answer: Article 25 of ABD's Patent Law stipulates: "No patent right shall be granted for the following items: (1) scientific discovery, (2) rules and methods of intellectual activities; (3) Methods of diagnosis and treatment of diseases; (4) Species of animals and plants; (5) substances obtained by nuclear transformation. A patent right may be granted to the production method of the products listed in Item (4) of the preceding paragraph in accordance with the provisions of this Law. "