Two balls begin at rest at the same height (but not at the same place)

At time t=0, one of them (A) is simply released,

and the other one (B) is launched straight horizontally.

After t=0, both of them are then freely falling.

Which one hits first?

BLUE: A hits the ground first

YELLOW: B hits the ground first

GREEN: They both hit simultaneously

PURPLE: Depends on which one is heavier.