Figure 2-7 Tesla Opened Its Gigafactory near Sparks, Nevada to Produce Lithium-Ion

Multiple Choice

Figure 2-7

Tesla opened its Gigafactory near Sparks, Nevada to produce lithium-ion batteries for both its automobiles and its Powerwall energy storage products. Figure 2-7 shows changes to its production possibilities frontier at the Gigafactory in response to new developments and different strategic production decisions.
-Sarita can bake either a combination of 25 cakes and 15 pies or a combination of 10 cakes and 20 pies.If she now bakes 10 cakes and 20 pies, what is the opportunity cost of baking an additional 15 cakes?

A) 5 pies
B) 10 pies
C) 15 pies
D) 20 pies