Answer:
Choice C. quarts
Explanation:
In one gallon there is 8 pints, 16 cups, and 4 quarts. So if the proportion was set up like this
it's likely that they are looking for how many quarts are in 3 gallons, and since we now know that 4 quarts is one gallon we can multiply 3 and 4 to get 12. So in 3 gallons there's 12 quarts.