8.施行上顎翻瓣手術時，下列何者可提供最佳止血效果？
(A)2％mepivacaine, 1:20,000 levonordefrin
(B)4％prilocaine, 1:200,000 epinephrine
(C)4％articaine, 1:100,000 epinephrine
(D)2％lidocaine, 1:50,000 epinephrine