If a matrix AAA is defined as A=(0111100010001000)A = \begin{pmatrix} 0 & 1 & 1 & 1 \\ 1 & 0 & 0 & 0 \\ 1 & 0 & 0 & 0 \\ 1 & 0 & 0 & 0 \end{pmatrix}A=0111100010001000, what is its non-zero positive eigenvalue?
3\sqrt{3}3
3
2
2\sqrt{2}2