Question

The topography of the ocean floor _____.

A. cannot be mapped like the continents
B. is smooth and flat
C. is as diverse as that of the continents
D. is uniformly hilly

Answer 1

I would say the answer is C. The ocean floor can be mapped, so it's not A. It's not smooth and flat, so B is out. And the ocean floor is not uniform, so that leaves C.

Answer 2

The answer to:  The topography of the ocean floor _____. is

C. is as diverse as that of the continents