An Equation of the Tangent Plane to the Surfaceat (1 $x + y = 0$

Multiple Choice

An equation of the tangent plane to the surfaceat (1, -1, 1) is

A) $x + y = 0$
B) $y - 2 z = x$
C) $x + 2 y - z = - 1$
D) $x - y - 2 z = 0$
E) $x - z = y$