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Pay off the credit card
Here is why:
1. Credit cards aren't amortized debt, so if you don't pay them down, they last forever and will never pay off.
2. The car is collateralized debt, so it is better to your credit score. It is an installment loan, it isn't open ended. It has a really low balance and a low APR.
3. Most debt reduction plans will tell you to pay off the highest APR debt first. This is so true and is true in this case because that debt is the worst debt of all, credit card debt.
Good luck!