Each column of the matrix represents a vertex of a triangle. If Rosa scales the triangle by finding 3T, what are the vertices of the scaled triangle?
A. (3, 3), (3, 9), (9, 3)
B. (0, 0), (0, 6), (6, 0)
C. (3, 3), (0, 9), (9, 0)
D. (0, 0), (0, 9), (9, 0)