Answer:
The most important factor a person should consider when creating a payment plan and deciding which debts to pay first is the interest rates on the loans. Therefore, the correct option is OD.
It is generally recommended to prioritize paying off the loans with the highest interest rates first, as these loans will accrue more interest over time and cost more in the long run. By paying off high-interest loans first, a person can save money on interest and potentially pay off all of their debts faster.