Because people prepare budgets, budget figures are often biased. Which of the following is true? a. When senior management sets budget numbers, a more realistic budget can be developed b. Sales quantity forecasts tend to be exaggerated (over-estimated) to make the sales team look good c. None of the answers are correct d. Production cost estimates tend to be overstated to create wiggle room (budgetary slack) e. Efficient organizations begin their budget process with last year's budget, and adjust the figures by a certain percentage