Final answer:
The requirement for annual HMDA reporting is to retain a copy of the submitted annual LAR for at least three years in paper or electronic form.
Step-by-step explanation:
The requirement for annual HMDA reporting is Option B: Retaining a copy of the submitted annual LAR for at least three years in paper or electronic form. This means that financial institutions must keep a record of the Loan Application Register (LAR) for a specified period to ensure accountability and compliance.