Answer: B
The purpose of implementing compulsory licensing of patent rights is to prevent the abuse of patent rights, safeguard the interests of the country and society, and promote the implementation and promotion of inventions and creations. The objects of compulsory license can only be invention patents and utility model patents, excluding design patents. For applications for compulsory licenses and cross-compulsory licenses caused by "failure to fully exploit the patent," the applicant should provide evidence to prove that it was unable to obtain the patentee's license within a reasonable time and under reasonable conditions. The decision to grant a compulsory license shall specify the scope and time of implementation based on the reasons for the compulsory license.