A sphere has a diameter of 8 cm. Which statements about the sphere are true? Select two choices. Recall the formula S A = 4 pi r squared. The sphere has a radius of 4 cm. The sphere has a radius of 16 cm. The surface area of the sphere is 32 pi centimeters squared. The surface area of the sphere is 64 pi centimeters squared. The surface area of the sphere is 256 pi centimeters squared.