知向量组A1,A2,A3线性无关,则下列向量组线性无关的是?
A A1+2A2,2A2+A3,A3-A1;
B A1-2A2,A2-A3,2A3-A1;
C 2A1-A2,A2+2A3,A3-A1;
D A1-A2,A2+2A3,2A3+A1;