1 quart = 32 fluid ounces
16 is half of 32 so 1 quart fills 2 mugs meaning that she needs 6 quarts of coffee
The best choice is 'C'. If it's 1, 5, and 4, then ideally, in 100 draws, you would expect 10, 50, and 40 ... pretty close to Tyrell's actual experimental results.