Q26
In his experiments with gravity, Issac Newton shoed how the motion of each planet in the solar system results from the combined gravitational pull of the Sun and of all the other planets, each contributing according to their mass and distance from the others.
A. of all the other planets, each contributing according to their
B. of all the other planets, with each of them contributing according to their
C. all the other planets, each of which contributing according to its
D. all the other planets, each contributing according to its
E. all the other planets, each of which contribute according to their
答案選D
這題答案算是比較沒問題的
可是我對於D的結構有點不了解說,
請問each contributing according to its mass and distance from the others 在整句話裡是當做同位語嗎? | 
