At a subduction zone where oceanic lithosphere meets continental lithosphere, which would subduct and why?

oceanic lithosphere—it is more buoyant on the mantle.
the oceanic lithosphere would subduct because it has a higher density at 3.0 grams per cubic centimeter.
continental lithosphere—it is thicker than the oceanic plate and can plow through it.
continental lithosphere—it is more buoyant on the mantle.
continental lithosphere—it has a higher density at 2.7 grams per cubic centimeter.