If $f(x) = (x + 1)^2$ for $x \ge 1$, and $g(x)$ is a function whose graph is the reflection of the graph of $f(x)$ in the line $y = x$, then $g(x)$ is:
- A$-\sqrt{x} - 1$
- B$\sqrt{x} + 1$
- C$\sqrt{x} - 1$
- D$\sqrt{x - 1}$
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