Which of the following may best describe the writer's style in writing the passage

A．There is little water contained in the atmosphere even in a heavy rainstorm.
B．In some places there falls an amount of over 400 inches of rain every year.
C．Most water vapor comes from the Oceans all over the world.
D．The process of water returning to the atmosphere is called evaporation.

A．The ocean.
B．The earth.
C．The rainfall.
D．The atmosphere.