Here's a short story: Jacob worked up a sweat riding his bicycle across the grass in the park, but had an easier time when finally he came to the street. This was because the surface of the street had (A) less friction (B) more friction. What is the most sensical answer between "street" and "grass"?
street

Here's a short story: Dan rolls a beach ball on the sand and the ball moves forward five feet. Dan rolls his beach ball on some rocks and the ball only moves two feet. There is less resistance on the (A) rocks (B) sand.. What is the most sensical answer between "sand" and "rocks"?
sand

Here's a short story: A roll with cinnamon sugar has been warmed up in the oven. The roll is pushed a little ways to move it off the cookie sheet. The roll moves a few inches. Then it slides off onto the plate. The second it hits the plate, it speeds up and flies off the plate. Which surface is stickier? (A) cookie sheet (B) plate. What is the most sensical answer between "cookie sheet" and "plate"?
cookie sheet