Answer:
D ) 10 cups
Explanation:
Since 4 quart = 1 gallon, multiply 4 by 15 to get 60 because there are 15 gallons.
Then, you divide 60 by 12 to get 5 because every 2 cups of fertilizer, 12 quarts of water is used.
Finally, multiply 5 by 2 because Anna uses 2 cups of fertilizer for every 12 quarts of water.
That's how you get the answer of 10 cups.