The assistant principal drew a diagram of the courtyard on a coordinate grid. He drew the bike rack at (-6, 1), the bench at (5, 1), and a table at (2, 5).
 The length of each square on the grid represented one yard.
 What was the distance between the bike rack and the bench?
 A. 
 6 yards
 B. 
 11 yards
 C. 
 8 yards
 D. 
 10 yards