[tex]\triangle ABC[/tex] is reflected about the line [tex]y = -x[/tex] to give [tex]\triangle A^{\prime} B^{\prime} C^{\prime}[/tex] with vertices [tex]A^{\prime}(-1,1), B^{\prime}(-2,-1), C(-1,0)[/tex]. What are the vertices of [tex]\triangle ABC[/tex]?
A. [tex]A(1,-1), B(-1,-2), C(0,-1)[/tex]
B. [tex]A(-1,1), B(1,2), C(0,1)[/tex]
C. [tex]A(-1,-1), B(-2,-1), C(-1,0)[/tex]
D. [tex]A(1,1), B(2,-1), C(1,0)[/tex]
E. [tex]A(1,2), B(-1,1), C(0,1)[/tex]