Which of these adjacency matrices represents a simple graph? a 11 a 12 a13 Note: [[a11, a 12, a13], [ a21, a22, a23], [ a31,a32,a33] ] is equivalent to a21 a22 a23 a31 a32 a33 O A) [[1, 0, 0], [0, 1, 0], [0, 1,1]] OB) ( [0, 1, 0], [1, 1, 1), (1, 0, 0] ] OC)[[0, 0, 1], [0, 0, 0], [0, 0, 1]] OD) [[0, 0, 1), (1, 0, 1), (1, 0, 1]] O E) All of them are simple graphs OF) B and D OG) None of the answers