Factor the Polynomial by Grouping $3 x ^ { 4 } - 8 x ^ { 2 } + 9 x ^ { 2 } - 24$

Multiple Choice

Factor the polynomial by grouping.
- $3 x ^ { 4 } - 8 x ^ { 2 } + 9 x ^ { 2 } - 24$

A) $\left( 3 x ^ { 2 } + 3 \right) \left( x ^ { 2 } - 8 \right)$
B) $\left( x ^ { 2 } + 3 \right) \left( 3 x ^ { 2 } - 8 \right)$
C) (x + 3) (8x - 3)
D) prime