Question

MEDAL!!!!!!!!!
∆ABC is reflected about the line y = -x to give ∆A'B'C' with vertices
A'(-1, 1), B'(-2, -1), C(-1, 0). What are the vertices of ∆ABC?

A.A(1, -1), B(-1, -2), C(0, -1)
B.A(-1, 1), B(1, 2), C(0, 1)
C.A(-1, -1), B(-2, -1), C(-1, 0)
D.A(1, 1), B(2, -1), C(1, 0)
E. A(1, 2), B(-1, 1), C(0, 1)