can you please help me answer this question in the image

Figure 2-4 Graph (a) Graph (b) 6 6 CUPS OF COFFEE N CUPS OF COFFEE N 2 5 2 3 5 6 DONUTS DONUTS Refer to Figure 2-4, Graph (a) and Graph (b). Which of the following is not a result of the shift of the economy's production possibilities frontier from Graph (a) to Graph (b)? Select one: O a. The opportunity cost of a cup of coffee is higher at all levels of coffee production. O b. Production of 2 donuts and 5 cups of coffee becomes possible. O c. The tradeoff between the production of donuts and cups of coffee changes. O d. Production of 2 donuts and 3 cups of coffee becomes efficient