please help me with this question

Consider the following matrix 2 1 A = 2 1 1 3 3 2 2 N After performing elementary row operations you are able to reduce A to the following matrix: O 0 Which of the following is a basis for the column space of A? OA. { (1, 2, 3), (2, 1, 3), (1, 1,2) } OB. ( (1, 0, 0), (2, -3, 0)} C. (1, 0, 0), (2, -3, 0), (1, -1, 0) } OP. ((1, 2, 1, 1, 1), (0, -3, -1, -1, -1)} OE. ((1, 2, 3), (2, 1, 3) }