Which of the following must be disclosed under Regulation Z (Truth in Lending)?

The correct choice emphasizes the requirement for lenders to disclose the "amount financed" under Regulation Z, which is part of the Truth in Lending Act. This regulation aims to promote informed use of consumer credit by requiring clear and transparent disclosures regarding loan terms and costs.

The "amount financed" represents the total amount of credit extended to the borrower, which, when disclosed, allows consumers to understand how much they are borrowing and the financial implications of their loan. This figure is crucial because it is foundational to calculating the consumer's overall debt obligation, along with other important costs such as interest rates and repayment terms. By standardizing this disclosure, Regulation Z helps ensure that consumers can compare different financing options effectively, making informed decisions based on a clear understanding of their financial responsibilities.

Other options, while informative and relevant to the financing process, do not carry the same level of mandated disclosure under Regulation Z. For instance, payment due dates and payment plan options might not always provide the comprehensive financial perspective that the "amount financed" does, and tax implications are not a requirement of this specific regulation. The focus of Regulation Z is primarily on aspects that directly inform consumers about the cost and terms of credit.