In a company, engineers have redesigned production processes lowering production costs, shortening production cycle time, reducing waste and improving quality. Which type of managerial activity applies to this situation? n Select one: a. controlling b. planning C. continuous improvement d. decision making If production volume increases from 16,000 to 20,000 units, Select one: a. total costs will increase by 25 percent. b. total costs will increase by 20 percent. C. total variable costs will increase by 25 percent. d. mixed and variable costs will increase by 25 percent