Sally is making a scale drawing of her apartment.
• She drew a line measuring 1 1/2 inches to represent the 12-foot width of her living room.
• The length of her living room is 18 feet.
How long a line should Sally draw to represent the length of her living room? 
A. 2 inches 
B. 2 1/4 inches
C. 2 1/2 inches 
D. 3 inches