Write an Expression for the Volume and Simplify Your Answer $3 x ^ { 3 } + 11 x ^ { 2 } + 30 x$

Write an expression for the volume and simplify your answer.

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A) $3 x ^ { 3 } + 11 x ^ { 2 } + 30 x$
B) $3 x ^ { 3 } + 90 x$
C) $3 x ^ { 3 } + 33 x + 90$
D) $3 x ^ { 3 } + 33 x ^ { 2 } + 90 x$