Which statement best describes inertia? 
A)	A piece of paper will fall toward earth at a faster rate than a baseball will	
 B)	If earth had no atmosphere, a baseball would fall toward earth at a faster rate than a piece of paper would.	 
C)	More force is needed to stop a moving car than to stop a train moving at the same speed.	
 D)	More force is needed to stop a moving train then to stop a car moving at the same speed.