My Home Courses Catalog and Study Tools Rental Options T3 College Success Tips & Career Success Tips RECOMMENDE OR YOU Getting an a Help E] Give Feedback 0 ng'cengagetcom % C y! \\' mgr oi metl :: 'l| MindTap - Cengage... v2. CENGAGE I MINDTAP Q Search this course Problem Set Ch 02 Questions 4 Question 4 of 10 r I 4_ Figure 2-4 5' Graph (a) Graph (b) CUPS 0F COFFEE CUPS 0F COFFEE 1 2 3 4 5 6 1 2 3 4 5 DONUTS DONUTS 0) Refer to Figure 2-4, Graph (21) and Graph (b) . A shift of the economy's production possibilities frontier from Graph (a) to Graph (b) could be caused by a. an improvement in both donut and coffee production technology. b. unemployment. c. an improvement in donut production technology. d. an improvement in coffee production technology. X