Adam has 4 1/3 gallons of apple juice, 3 5/9 gallons of orange juice, and 3 1/2 gallons of soda in his refrigerator. 
 How many gallons of juice does Adam have altogether in his refrigerator? 
 A.7 2/3 gallons
 B.7 5/6 gallons
 C.7 2/9 gallons
 D.7 8/9 gallons