The vertices of triangle QPR are Q (-4,0), P (-6, 7), and R (-2, 1). / is rotated 90° counterclockwise about the origin to form Q' P' R'. What are the coordinates of the vertices of Q'P'R'?
A. Q' (0, - 4), P' (-7, - 6), R' (-1, - 2)
B. Q' (0, - 4), P' (7, 6), R' (1, - 2)
C. Q' (0, 4), P' (-7, 6), R' (-1, 2)
D. Q' (4, 0), P' (6, 7), R' (2, - 1)
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