Refer to the Graph. Mario is self-sufficient and so is Mia. Each produces 6 dishes of pasta and 4 pizzas. Mario and Mia decide to specialize and trade. After they have specialized and traded, compared to the initial situation, Mia's opportunity cost of pasta has ________ and Mario's opportunity cost of a pizza has ________:
A) decreased, decreased
B) increased, increased
C) increased, decreased
D) decreased, increased
Answer: B