Describe the Surface Whose Equation in Cylindrical Coordinates Is $\phi = 3$

Multiple Choice

Describe the surface whose equation in cylindrical coordinates is $\phi = 3$ .

A) Cylinder with vertical axis
B) Cylinder with horizontal axis
C) Sphere
D) Vertical plane or half-plane
E) Horizontal plane or half-plane
F) Paraboloid
G) Cone or half-cone with vertical axis
H) Cone or half-cone with horizontal axis