Answer: C
Item A, according to Article 21 of the Implementing Rules of the Patent Law, the independent claim of an invention or utility model should include the preamble and features Part, the preamble part and the characterizing part together define the scope of protection claimed by the invention or utility model. Item B, according to the provisions of Article 11, Paragraph 1 of the Patent Law, patent claims include two types: patented products and patented methods. Item C. According to the provisions of Article 22 of the Implementing Rules of the Patent Law, the dependent claims of an invention or utility model shall include a quotation part and a qualifying part, of which the qualifying part must state the additional technical features of the invention or utility model. Item D, Article 26 of the Patent Law stipulates that claims should be based on the description and clearly and briefly define the scope of patent protection requested.