Given the question: Here's a short story: Harold knows that when he rides his skateboard over gritty pavement it has more friction then when he rides it over swept pavement. This means that his skateboard can't go as fast over (A) gritty pavement (B) swept pavement. What is the most sensical answer between "gritty pavement" and "swept pavement"?
The answer is:
gritty pavement