The figure depicts the production possibilities curve when Ann and Bob engage in trade. With all her resources, Ann can either produce two computer programs or one Web site. With all his resources, Bob can either produce one computer program or three Web sites. What should be the values of C and D? A. C = 1, D = 1 B. C = 2, D = 3 C. C = 4, D = 3 D. C = 3, D = 4