[单选题]
A rocket moves through outer space with a c/ )kutj)vy .dzbm dt8.onstalo-fo.l d e6m1nt velocity of 9.8 m/s. What ne olel.- mo1fd6t force acts on it?
A. a force equal to its weight on Earth, mg
B. a force equal to the gravity acting on it
C. The net force is zero.
D. cannot be determined without more information
