Exhibit 34-1

Country A

Country B

Good X

Good Y

Good X

Good Y

90

0

30

0

60

30

20

20

30

60

10

40

0

90

0

60

Refer to Exhibit 34-1. The opportunity cost of one unit of X in country B is

Group of answer choices

20 units of Y.

0.33 units of Y.

1 unit of Y.

2 units of Y.