Given $\frac{x^2-1}{x^2-x}$, simplify and state all values of $x$ that are excluded from the domain of the original expression.

$x+1$, with $x\ne 1$

$\frac{x+1}{x}$, with $x\ne 0$ only

$\frac{x-1}{x}$, with $x\ne 1$

$\frac{x+1}{x}$, with $x\ne 0$ and $x\ne 1$