Which statement describes seafloor spreading?
O A. Ocean basins grow wider as new oceanic crust forms at a
divergent boundary.
B. Ocean basins grow narrower as one plate is forced downward at a
convergent boundary.
C. Deep trenches form between two plates that are moving away
from each other at a divergent boundary.
D. Deep trenches form where an oceanic plate is forced under a
continent at a convergent boundary.