In the Accompanying Diagrams, Solid Lines Are Production Possibilities Curves

In the accompanying diagrams, solid lines are production possibilities curves, and the dashed lines are trading possibilities curves. The opportunity cost of producing a

A) pizza is 2 beers in both countries.
B) beer is ½ pizza in both countries.
C) pizza in East Lothian is 1 beer.
D) beer in West Lothian is ½ pizza.