Refer to the Diagrams Below

Refer to the diagrams below. The solid lines are production possibilities curves; the dashed lines are trading possibilities curves. The trading possibilities curves suggest that the terms of trade are:

A) 1.5 beers for 1 pizza.
B) 1 beer for 2 pizzas.
C) 2 beers for 1 pizza.
D) 1 beer for 1.5 pizzas.