(Question)
Here's a short story: A horse running through an open field experiences more friction then one running on a race track. This means the horse can run at a greater rate of speed running on the (A) race track (B) open field. What is the most sensical answer between "open field" and "race track"?
(Answer)
open field

(Question)
Here's a short story: Sliding a hair brush across a sandy floor makes the brush heat up less then sliding it across a gritty floor. This means the _____ is the smoothest surface (A) sandy floor (B) gritty floor. What is the most sensical answer between "sandy floor" and "gritty floor"?
(Answer)
sandy floor

(Question)
Here's a short story: Tim was playing around with his sled and noticed that it slid faster on the smoother surface than on the rougher one. The sled slid faster on (A) the ice (B) the grass. What is the most sensical answer between "ice" and "grass"?
(Answer)
ice