The Figure Given Below Represents the PPC in Two Nations

The figure given below represents the PPC in two nations - Germany and Korea, producing only two goods cars and food.
Figure 2.4


-Refer to Figure 2.4.What would be the marginal opportunity cost of producing one unit of food in Korea assuming the economy is at point B?

A) Two and a half cars
B) One and a half car
C) Two cars
D) Half a car
E) Three cars