Which of the following is true? a. A budget with a high level of budgetary slack is one created with easily attainable goals. b. With regard to budgets, control refers to top management setting difficult to attain targets to maximize productivity. O C. A perpetual budget is a budget prepared for a one year period corresponding to a company's fiscal year. d. Responsibility accounting refers to using budgets to determine who is responsible for the company not meeting its goals