Which of the following statements is incorrect concerning budget preparation? O A. The rolling budget approach is not often used in practice because it requires that management be in perpetual budgeting mode. B. If a participative approach is used to prepare budgets, all levels of management are involved in the budgeting process. C. The preparation of the sales budget is the starting point in the budgeting process for all companies. D. If a zero-based budgeting approach is used, the annual budgeting process begins with a review of the results of the prior operating period. E. Participative budgeting increases the risk that employees will create budgetary slack