Multiply, and Then Simplify If Possible $( \sqrt [ 3 ] { 9 } + 3 ) ( \sqrt [ 3 ] { 3 } - 1 )$

Multiple Choice

Multiply, and then simplify if possible. Assume all variables represent positive real numbers.
- $( \sqrt [ 3 ] { 9 } + 3 ) ( \sqrt [ 3 ] { 3 } - 1 )$

A) 0
B) $\sqrt [ 3 ] { 9 } - 3 \sqrt [ 3 ] { 3 }$
C) $3 \sqrt [ 3 ] { 3 } + \sqrt [ 3 ] { 9 }$
D) $3 \sqrt [ 3 ] { 3 } - \sqrt [ 3 ] { 9 }$