Consider Boeing (a producer of jet aircraft), General Mills (a producer of breakfast cereals), and Wacky Jack's (which claims to be the largest U. S. provider of singing telegrams). For which of these firms is the short run the longest period of time? For which is the long run the shortest? Explain. The short run is longest for A. Boeing because aircraft production is most profitable and the long run is shortest for Wacky Jack's because providing singing telegrams is least profitable. B. Boeing because it is the largest provider of aircraft and the long run is shortest for General Mills because it is a relatively small cereal producer. C. Boeing because aircraft production requires large, specialized machines and the long run is shortest for Wacky Jack's because providing singing telegrams requires primarily labor. D. Boeing because aircraft production is labor-intensive and the long run is shortest for Wacky Jack's because providing singing telegrams is capital-intensive. E. Boeing because aircraft production is relatively expensive and the long run is shortest for Wacky Jack's because providing singing telegrams is relatively cheap.