Answer:
The ones that can be used are (B and A)
The ones that cannot be used are (C and D)
Explanation:
Because the panthers got 6 less and the tigers got 22…
b+6 would make 22 (panthers plus 6 makes tigers)
22-b would also be 6 because 6+b makes 22, so subtracting b from 22 makes 6