John jones, senior vp for zanda corp., is looking at three alternative aggregate production plans for the next six-month period. at his company, demand varies by month with substantial month-to-month differences. the three alternatives are a "pure level plan," which keeps an absolutely constant workforce, a "pure chase plan" relying on hiring and layoffs, and a hybrid plan. he is most likely to find that the hybrid plan: a.) has higher hiring/layoff cost than the chase plan and higher inventory carrying cost than the level plan. b.) has lower inventory carrying cost than the chase plan and higher hiring/layoff cost than the level plan. c.) none of these selections. d.) has lower inventory carrying cost than the level plan and lower hiring/layoff cost than the chase plan.