Sediment settles at the bottom of the ocean floor

As you have read, sediments cover the deep ocean floor, sometimes in layers thick enough to bury abyssal hills. ... These shells are the remains of tiny floating protists and animals found living in the mixed layer at the ocean surface. When these organisms die, their shells settle to the bottom.

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots