Final answer:
The income-sensitive repayment plan is based on annual income, adjusting monthly payments according to income and debt levels, and interest rates on financial aid are classified as quantitative continuous.
Step-by-step explanation:
The loan repayment plan that is based solely on annual income is C) Income-sensitive repayment plan. This plan adjusts the amount you pay each month based on your annual gross income and student loan debt. Unlike other plans, where the payments are fixed or gradually increase, an income-sensitive plan changes as your income changes, making it more flexible for borrowers who might have a fluctuating income.
Answering the second part of the question: The interest rate charged on the financial aid would be classified as B) Quantitative continuous, as it can take on any value within a range and is measurable. Interest rates on loans typically vary over time and are not restricted to discrete values.