2. Which best describes how the scientists could explain their observations? A They thought that sediment washing in from the shore formed the ocean
floor, and continued to build out from the shore.
B They thought that strong ocean waves pushed the younger rock
material toward the middle of the ocean.
C They thought that wave erosion at the shore removed the younger rock
layers that were on top of the older rock layers.
D They thought the young rock formed at the mid-ocean ridge and pushed
the older rock toward the shore.