设三阶方阵A的特征值分别为，则A-1的特征值为（ ）。\n \n \n \n \n \n \n

\n \n \n \n A.\n

\n \n \n

\n \n \n \n B.\n

\n \n \n

\n \n \n \n C.\n

\n \n \n

\n \n \n \n D.\n 2,4,3\n