Given the question: Question: Pam took a large piece of cardboard and slid on it across the snow, and another day she slid on the cardboard across the grass. The cardboard traveled a greater distance across the snow than it did across the grass because there was more resistance on the (A) grass (B) snow.  Do not use A and B to answer the question but instead, choose between "snow" and  "grass".
The answer is:
snow