Hello!
1 cup = 0.5 pints
1 cup = 0.25 quarts
That means that 9 cups are equivalent to 4.5 pints and 2.25 quarts of liquid.
1 pint = 2 cups
1 pint = 0.5 quarts
That means that 5 pints are equivalent to 10 cups and 2.5 quarts of liquid.
1 quart = 4 cups
1 quart = 2 pints
That means that 2 quarts are equivalent to 8 cups and 4 pints of liquid.
FINAL ANSWER:
Judging by our calculations, Container B has the greatest capacity.