Describe the set {(r,8,z): r=8z) in cylindrical coordinates.

A. The set is a cone that opens upward with its vertex at the origin. When the distance from the z-axis is increased by 1 unit, the surface of the cone moves up 8 units.
B. The set is a cone that opens downward with its vertex at the origin. When the distance from the z-axis is increased by 8 units, the surface of the cone moves down 1 unit..
C. The set is a cone that opens upward with its vertex at the origin. When the distance from the z-axis is increased by 8 units, the surface of the cone moves up 1 unit.
D. The set is a cone that opens downward with its vertex at the origin. When the distance from the z-axis is increased by 1 unit, the surface of the cone moves down 8 units.