请教GWD-TN-18 13

The discovery that Earth’s inner core rotates
independently of and more quickly than Earth’s outer layers is responsible for
advancing studies of the flow of heat from the inner through the outer planet
and of the formation and periodic reversal in direction of Earth’s magnetic
field.

A.     
core rotates independently of and more quickly than Earth’s
outer layers is responsible for advancing studies of the flow of heat from the
inner through the outer planet and of the formation and periodic reversal in
direction of Earth’s magnetic field

B.      
core rotates independently of and more quickly than Earth’s
outer layers is responsible for advancing studies of how heat from the inner
core flows through the outer planet, and the formation and periodic reversal in
direction of Earth’s magnetic field

C.     
core rotates independently and more quickly than Earth’s
outer layers are responsible for advancing studies of how heat from the inner
core flows through the outer planet, and how Earth’s magnetic field forms and
the periodic reversal of its direction

D.     
core, rotating independently and more quickly than Earth’s
outer layers, are responsible for advancing studies of the flow of heat from
the inner through the outer planet, and the formation and periodic reversal in
direction of Earth’s magnetic field

E.      
core, rotating independently of and more quickly than
Earth’s outer layers, is responsible for advancing studies of the flow of heat
from the inner through the outer planet and of how Earth’s magnetic field forms
and the periodic reversal of its direction

答案A，但是不明白句子indenpendently 后面的of是怎么回事，而且句子成分始终觉得很混乱

请指教。。。

谢谢