The correct response is:
Minerals from the crust dissolve in water that is superheated by magma, and the minerals are deposited on the ocean floor as the water cools.
At divergent boundaries, tectonic plates pull apart, allowing magma from the mantle to rise and create new oceanic crust. The interaction of this superheated magma with seawater can lead to mineral formation as the dissolved minerals precipitate out when the temperature of the water decreases.