Need help with practice problem

(e) Suppose the surface given by the parameterization (i.e. vector equation) r (u, v) = (sin (u ) cos (v))i + (sin (u )sin (v))j + (cos (u )) k is graphed in R3. Which choice most accurately represents what the surface looks like? Simply circle your answer. A. A sphere centered at the origin B. An ellipsoid which is not a sphere C. A right circular cylinder D. An elliptic paraboloid