Let P be the image of the point (3, 1, 7) with respect to the plane x – y + z = 3. Then the equation of the plane passing through P and containing the straight line \(\frac{x}{1}=\frac{y}{2}=\frac{z}{1}\) is
(A) x + y – 3z = 0
(B) 3x + z = 0
(C) x – 4y + 7z = 0
(D) 2x – y = 0