17数组中元素如下:31 201 68 17 51 54 189 10 315 76,归并算法递归层次为( )\n \n \n \n \n \n \n

\n \n \n \n A.\n 5\n

\n \n

\n \n \n \n B.\n 4\n

\n \n

\n \n \n \n C.\n 3\n

\n \n

\n \n \n \n D.\n 2 \n