Which proportional relationship can be represented by this equation? b=3c A. There are 27 boaters (b) in 9 canoes (c). B. There are 12 cups (c) of juice in every 4 bottles (b). C. The librarian needs 44 books (b) for 14 children (c). D. The cost (c) is $18 to purchase 6 baseballs (b).