Evaluate the integral: ∫(x2 dx)/((196+x2)2) using trigonometric substitution.

A) ∫(x2 dx)/(14+x2)
B) ∫(x2 dx)/(142+x2)
C) ∫(x2 dx)/(196+x^4)
D) ∫(x2 dx)/(196+x2)2