The Country of Econoland Produces Two Goods:textbooks and Widgets

Multiple Choice

The country of Econoland produces two goods:textbooks and widgets.Last year,it produced at a point inside its production possibilities frontier and currently it is operating at a point on the (same) production possibilities frontier.Which statement best explains the change

A) Econoland was originally experiencing unemployment but is now employing all its resources.
B) Econoland experienced an improvement in widget-making technology.
C) Econoland acquired more resources.
D) Econoland experienced a high level of emigration out of the country.