The Following Equations Represent a Curve or a Surface $\rho$ $\varphi$

Multiple Choice

The following equations represent a curve or a surface.Select the best geometric description. (Note: $\rho$ , $\varphi$ , $\theta$ are spherical coordinates; r, $\theta$ , z are cylindrical coordinates.) $x = t , y = 2 t , z = 3 t , 0 \leq t \leq 10$

A) Part of a line through the origin
B) Part of a cylinder.
C) Part of a cone.
D) Disk