If $f(x) = \frac{2x + 3}{x - 1}$, find $f^{-1}(x)$ and state the value of $x$ for which $f^{-1}(x)$ is undefined.

• A$f^{-1}(x) = \frac{2x+3}{x-1}$; undefined at $x = 1$
• B$f^{-1}(x) = \frac{x+3}{x-2}$; undefined at $x = 2$
• C$f^{-1}(x) = \frac{x-3}{x+2}$; undefined at $x = -2$
• D$f^{-1}(x) = \frac{x+3}{x-2}$; undefined at $x = 0$

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