What is the MAC broadcast address?

$0\mathrm{.}1\mathrm{.}2\mathrm{.}3$

$127\mathrm{.}0\mathrm{.}0.$FF

FF$-$FF$-$FF$-$FF$-$FF$-$FF

$1\mathrm{.}1\mathrm{.}1\mathrm{.}1$