Answer: D.  
The radius is 11 units, and the volume is 5,572.45 cubic units.
Step-by-step explanation:
We know that the volume of a sphere is given by :-
 , where r is radius of the sphere.
, where r is radius of the sphere.
Given : The diameter of the sphere = 22 units
Then the radius of the sphere = 
Then , the volume of the sphere will be :- 

Hence, the volume of the sphere =  5,572.45 cubic units