Here's a short story: A bicycle moved at a higher rate of speed across a blue floor than it did across a red floor because the smoother surface was (A) the blue floor (B) the red floor..  What is the most sensical answer between "blue floor" and  "red floor"?
blue floor

Here's a short story: Ada was playing kickball. She kicked a ball into the gravel and noticed it was warm when she picked it up. She kicked it again onto a grassy hill, but this time the ball wasn't very hot when she retrieved it. In which surface did the ball travel the most? (A) gravel (B) grassy hill.  What is the most sensical answer between "gravel" and  "grassy hill"?
grassy hill

Here's a short story: Tandy discovered that air is smoother than water by using his fan in both substances. His fan heated up more in the (A) air (B) water.  What is the most sensical answer between "air" and  "water"?
water