设一个n元齐次线性方程组的系数矩阵的秩r(A)=n-3, 且
为此方程组的三个线性无关的解， 则( )不是此方程组的基础解系。\n \n \n \n \n \n \n \n \n \n 
\n \n \n 
\n \n \n 
为此方程组的三个线性无关的解， 则( )不是此方程组的基础解系。\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