Refer to the Above Diagrams

Refer to the above diagrams.The solid lines are production possibilities curves; the dashed lines are trading possibilities curves.The opportunity cost of producing a:

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