Find a parametrization of the surface. 2 vx +y The first-octant portion of the cone z = 4 between the planes z = 0 and z = 9 What is the correct parametrization? Select the correct choice below and fill in the answer boxes within your choice (Type exact answers.) O A. r(r,0) = + K sIs SOS O B. r(r,0) = + K. Ers SOS O c. r(r,0) = + SIs SOS O D. r(r,0) = + Ers SOS