Final answer:
The term that is not a trigger term for closed-end credit is D) Interest rate, unless it is specified as the APR, in which case it would be a trigger term requiring additional disclosures.
Step-by-step explanation:
The question is asking which term is not a trigger term for closed-end credit. For such credit agreements, trigger terms are specific financial terms that, when used in advertising, require the disclosure of additional details about the credit terms. The terms listed are Annual Percentage Rate (APR), down payment, monthly payment, and interest rate. In the context of closed-end credit, which is a loan for a set amount requiring regular repayments, all of these except the interest rate require the full disclosure of terms if mentioned in an advertisement. The interest rate alone does not trigger these requirements unless it is specific to the cost of the credit, in which case, it is synonymous with the APR. Therefore, the answer is D) Interest rate, which is not a trigger term for closed-end credit unless specified as APR.