Which expression represents the volume, in cubic units, of the shaded region of the composite figure?
A
1 third 1 half 10 8 14 minus pi open paren 2 point 5 squared close paren 8B
1 half 14 10 8 plus pi open paren 2 point 5 squared close paren 8C
1 third 1 half 10 8 14 plus pi open paren 2 point 5 squared close paren 8D
1 half 14 10 8 minus pi open paren 2 point 5 squared close paren 8