Which of the following is an example of Antarctica's role in the earth's
climate?
A The lightness of the polar oceans reflect heat from the Sun rather
than absorbing it.
B Antarctic ice acts as a shield, keeping the earth cool by reflecting the
Sun's heat rather than absorbing it.
C The ice-cold waters of the Southern Ocean restrict heat currents
from escaping to the rest of the world.
D The Antarctic ozone hole prevents all greenhouse gases from
penetrating the earth.