Answer:
B
Step-by-step explanation:
Because i took the test
 
        
                    
             
        
        
        
Answer:
3 gallons
Step-by-step explanation:
Each wall 12 x 20 = 240 feet squared
4 walls =  4 x 240 = 960 squared feet
960 divided into 320 = 3
1 gallon --------320
1 gallon------------320
1 gallon-----------320
                     3 gallons----------960