Integrate (x³ + 3x² + x + 9)/((x² + 1)(x² + 3)) with respect to x:

A) ∫(x³ + 3x² + x + 9)/((x² + 1)(x² + 3)) dx
B) ∫(x³ + 3x² + x + 9)/(x^4 + 4x² + 3) dx
C) ∫(x³ + 3x² + x + 9)/(x^4 + 4x² + 4) dx
D) ∫(x³ + 3x² + x + 9)/(x^4 + 4x² + 5) dx