The value of the expression $\frac{x^3 + 3x^2 + 3x + 1}{x^4 + 4x^3 + 6x^2 + 4x + 1}$ at $x = 2$ is:
- A$3$
- B$\frac{25}{61}$
- C$\frac{1}{3}$
- D$\frac{19}{73}$
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