Answer the following question: Here's a logic test: Sara closed her computer and absentmindedly pushed a paper towel roll across the plastic computer lid. Then she pushed the paper towel roll across a couch cushion. She quickly realizes that the paper towel roll moves more easily on the plastic computer lid than it does on the couch cushion, which she concludes is because there is more friction on (A) the couch cushion (B) the plastic computer lid.  Choose the answer between "plastic computer lid" and "couch cushion".
Answer:
plastic computer lid