After studying plate tectonics, Lee became interested in mid-ocean ridges and how rock develops as the tectonic plates spread apart, so he decided to investigate further. Which of the following statements are true about sea-floor spreading? Choose the three statements that apply. A. Young rock forms in layers on the ocean floor as spreading occurs.
B. Magma flows through cracks in Earth's crust and hardens.
C. Continental crust is formed by the ridges as they grow.
D. Mid-ocean ridges are the sources of the spreading.
E. Older rock is farther away from the mid-ocean ridges.