First one who answers this correctly will be marked brainliest, , and 5 stars will be given!

what is ridge push?

a) cooler, denser crust sinks into the mantle

b) when edges become denser and gravity pulls them downward and away from one another

c) currents just beneath earth’s crust flow very slowly, causing movement in the plates above them

d) folding and crumpling and sliding upward creating mountains