A \( \left ( 1 - a^{4} \right ) - b^{2} \left ( 4 - b^{2} \right ) \)
B \( - 2 a \left ( 1 + a^{2} + b^{2} \right ) \)
C \( \left ( 1 + a^{2} + b^{2} \right )^{3} \)
D None
Correct Answer: Option B
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