A Man in a Spacecraft That Is Moving with a Velocity

Multiple Choice

A man in a spacecraft that is moving with a velocity V₀ in free space runs forward and then stops.The center of mass of the system (that is,the ship and the man)

A) slows while the man is running,then speeds up when he stops.
B) slows while the man is running,then resumes its original velocity when he stops.
C) moves faster while the man is running,then slows when he stops.
D) moves faster while the man is running,then resumes its original velocity when he stops.
E) continues all the while at its original velocity.