The stars, some of them at tremendous speeds, are in motion just as the planets are, yet being so far away from the Earth that their apparent positions in the sky do not change enough for their movement to be observed during a single human lifetime.

(A) The stars, some of them at tremendous speeds, are in motion just as the planets are, yet being

(B) Like the planets, the stars are in motion, some of them at tremendous speeds, but they are

(C) Although like the planets the stars are in motion, some of them at tremendous speeds, yet

(D) As the planets, the stars are in motion, some of them at tremendous speeds, but they are

(E) The stars are in motion like the planets, some of which at tremendous speeds are in motion but

OA B

Source: Official Guide