Which one of the following is true about a participative bottom-up approach in budgeting? A. Departmental managers always keep in mind of company's objectives. B. It is not time-consuming to prepare and consolidate budgets. C. The budget estimates are accurate as departmental maangers have a better understanding of what results can be achieved and at what costs. D. The central staff may not have all the knowledge needed to prepare the budget within every department of the company