Given a sphere with radius r, the formula 4 r2 gives
O A. the volume
O B. the surface area
O c. the radius
O D. the cross-sectional area
![Given a sphere with radius r the formula 4 r2 gives O A the volume O B the surface area O c the radius O D the crosssectional area class=](https://us-static.z-dn.net/files/def/fd9e4fed8cf8ef730dc6ab5daf230c2c.png)