The Board must account for receipts and expenditures within the framework of what timeframe?

The correct choice is the fiscal year, which is a crucial concept in financial planning and management for organizations, including a board overseeing dental hygiene practices. The fiscal year refers to a one-year period that companies use for financial reporting and budgeting, and it does not necessarily coincide with the calendar year, which runs from January 1 to December 31.

In the context of the Board's responsibility to account for receipts and expenditures, adhering to a fiscal year allows for a structured and consistent approach to financial management. It enables the board to analyze financial performance over a defined period, facilitating better planning, forecasting, and resource allocation. This framework ensures that all financial activities are adequately monitored and reported within a specific timeframe, which is essential for transparency and accountability to stakeholders.

The other options, such as the calendar year and quarterly reporting, have different implications. The calendar year is commonly used for personal financial planning but doesn't meet the specific regulatory or operational needs of governing bodies. Biennial years don't provide the regular oversight necessary for ongoing financial management, while quarterly reporting, though useful for interim assessments, would not satisfy the broader annual reporting requirements assumed by the board for strategic decision-making. Thus, the fiscal year is the most appropriate choice for the Board's accounting practices.