Which discovery made through ocean-floor mapping led to information that advanced the theory of continental drift? question 5 options: the ocean floor was flat and had no geological features similar to those on land. the ocean floor has no geologic processes linked or similar to those on land. ocean sediment was thinner than it should have been if the ocean floor had always been in the same place. ocean sediment was thicker than it should have been for the ocean floor to be linked to processes on land.