How does sea-floor spreading occur?

A)New materials are being added to the asthenosphere
B) Earthquakes break apart the ocean floor
C)Sediments accumulate at the areas of the spreading
D)Molten material beneath Earth's crust rises to the surface

8 answers

is it c

http://www.phschool.com/itext/sci_exp/ebook/products/0-13-181243-2/sx5055a3.gif

So is it D then?

Yes, I think it's D. But check your text to be sure.

Yes, D. The then rising molten magna cools, and spreads the existing plates away.

the answer is D :)

D
A
C
B

Glitch is correct