An Equation of the Tangent Plane to the Surface $x ^ { 2 } = 12 y$

Multiple Choice

An equation of the tangent plane to the surface $x ^ { 2 } = 12 y$ at (-6, 3, 1) is

A) $x - y = 7$
B) $x + y = 7$
C) $x + y = 9$
D) $x - y = 9$
E) $- x + y = 9$