HW Score: 80.95%, 5.67 of 7 points Homework: Section 13.6 Assignment Question 6, 13.6.54 Points: 0 of 1 Identify the surface defined by the following equation. x2 +y2+522+8x=-15 Select the correct choice below and fill in the answer boxes to complete your choice. O A. The surface defined by the equation is an elliptic cone centered at ( and whose traces in the xy-plane are ellipses. O B. The surface defined by the equation is an ellipsoid centered at ( . ) that has length |in the x-direction, in the y-direction, and in the z-direction. O C. The surface defined by the equation is a hyperboloid of one sheet centered at and is centered around the z-axis. In the xy-plane, the trace has length |in the x-direction and length in the y-direction. O D. The surface defined by the equation is a hyperboloid of two sheets centered at ( and whose traces in the xy-plane are ellipses. The shortest distance between the two sheets is