Read the following statement. Some scientists believe that the Arctic Ocean should be called a sea.
A
Stretching for about 5.4 million square miles, the Arctic Ocean measures about 150 percent larger than North America.
B
Frigid conditions keep the Arctic Ocean partly covered in ice throughout the year.
C
The relatively small size and depth of the Arctic Ocean have led some to resist classifying it as an ocean.
D
Seas are considered smaller parts of oceans that are partially enclosed by land

Which sentence from the article provides the BEST support for the above statement?