Here's a short story: Penelope kicks the ball along the grass surface of a soccer field, then later she kicks it with the same force along an artificial turf field. The ball rolls for a longer time on the artificial turf than it does on the grass, which is due to the more smooth surface of the (A) artificial turf (B) grass..  What is the most sensical answer between "artificial turf" and  "grass"?
The answer to this question is:
artificial turf