Question

Please help me with this problem please
1.Your parents have 3 credit cards. Each has its entire credit line used, and the credit limits are $1,800.00, $2,600.00, and $3,500.00. Paying off and closing which card would increase your parents' debt ratio the most?
a.) The debt ratio remains the same
B.) $3,500.00 limit
c.) $2,600.00 limit