6 When the applicant employs a patent agent, a ______ shall be submitted to the Patent Authority to specify the extent of authorization by the applicant. Choose the one phrase that best completes the above sentence:
(A) License to Practice
(B) Power of Attorney
(C) Certification of enrollment
(D) Letter of Credit

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統計： A(0), B(1), C(0), D(0), E(0) #1248217