Question: Tired of studying, John shoves his math book away on his metal desk and it slides off the far end and lands on the floor. Curious, he picks the book up and shoves it across his wooden kitchen table, and it doesn't go as far. This is because (A) the metal desk is smoother (B) the wooden kitchen table is smoother Do not use A and B to answer the question but instead, choose between "metal desk" and "wooden kitchen table".
The answer to this question is:
metal desk