已知向量组 $\alpha_1, \alpha_2, \alpha_3$ 线性无关, 则以下向量组中线性相关的是
A
$\alpha_1+\alpha_2, \alpha_2+\alpha_3, 2 \alpha_1+\alpha_2+\alpha_3$.
B
$\alpha_1+2 \alpha_2, \alpha_2+2 \alpha_3, \alpha_3+2 \alpha_1$.
C
$\alpha_1+\alpha_2, \alpha_2+\alpha_3, \alpha_1+\alpha_2+2 \alpha_3$.
D
$\alpha_1+\alpha_2, \alpha_2+\alpha_3, \alpha_1+2 \alpha_2+\alpha_3$.
E
F