Given Below Is the Production Possibilities Schedule for Capital Goods

Given below is the production possibilities schedule for capital goods and consumer goods. Table 2.3
If the nation depicted in Figure 2.3 is producing at combination E, the opportunity cost of producing the tenth unit of consumer good is:

A) 10 units of capital goods.
B) 6 units of capital goods.
C) 1 unit of capital good.
D) 4 units of capital goods.
E) zero unit of capital good.