Question

J . 15. Among the matrices A= 0 0 0 1 0 0 1 0 0100 | 1 0 0 0 B= /0 0 1 0 1 0 100) 1 -1 0 ,C=1 0 1 3 0 0 0 1 ) / 0 1 0 /1 0 0 | 1 1 0 D= 200, E= 10-20, F01 0. 100 1 ) 0 0 1 0 0 1 A) A, B, C, E and F are elementary, the others are not; B) B, E and F are elementary, the others are not; C) A, B, E and F are elementary, the others are not; D) none of these matrices is elementary, E) they are all elementary.