PLEASE HELP!!

Find the domain of the relation:
{(-4, -1), (-2, 1), (0, 1), (2, 3), (4,0)}


{-1,0, 1,3}

{-4, -2, -1, 0, 1, 2, 3, 43

{-4, -2, 0, 2, 4}

{-4, 0, 2, 4}