Which regulation is primarily concerned with consumer lending practices and truth in lending?

Regulation Z is the correct answer because it implements the Truth in Lending Act (TILA), which is designed specifically to promote informed consumer decision-making in credit transactions. This regulation requires lenders to disclose key terms of loans, including the annual percentage rate (APR), terms of repayment, and the total costs of credit. By ensuring that consumers receive clear and standardized information about the costs associated with borrowing, Regulation Z aims to protect consumers from misleading lending practices.

The other regulations do not focus primarily on consumer lending practices or truth in lending. Regulation X pertains to the Real Estate Settlement Procedures Act (RESPA), which governs disclosures related to mortgage settlements and the costs associated with them. Regulation BB involves the Community Reinvestment Act (CRA), which aims to encourage financial institutions to help meet the credit needs of the communities in which they operate. Regulation AA addresses the practice of unfair or deceptive acts or practices in consumer transactions, but it does not specifically center on the requirements of truth in lending as Regulation Z does.