A Dom\[f=\mathbb{R}\] B Dom\[f=\emptyset \] C Dom\[f=[-1; 1]\] D Dom\[f = \langle \left. -\infty; -1 \right] \cup \left[ 1; + \infty \right. \rangle \] E Dom\[f=\left[ 1; + \infty \right. \rangle \]