Which of the following statements is incorrect concerning budget preparation? O A. Participative budgeting decreases the risk that employees will create budgetary slack. B. The advantage of the rolling budget approach is that it keeps management focused on their operational and strategic goals. OC. If a participative approach is used to prepare budgets, multiple levels of management are involved in the budgeting process. OD. The preparation of the sales budget is the starting point in the budgeting process for all companies. O E. A zero-based budgeting approach requires that all budgeted amounts be justified" during the budgeting process