The surface area of a sphere with a diameter of 12 units is:

The formula for the surface area of a sphere is given by 4pi*r^2, where r is the radius. We also know that the diameter of the sphere is 12 units, so its radius is 12/2 = 6 units. Thus, we can conclude that the surface area of that sphere is 4pi*36, which is about 452 units, or B. 

(B)452.39 since it is A=4πr^2 and r=6 so A=452.39