If a nation were to experience an influx of foreign labor into the market for corn production, the production possibilities frontier for the nation would:
a. shift inward due to the reduction in relative wages.
b. shift outward due to an increase in one factor of production.
c. stay right where it is because labor has nothing to do with the Heckscher-Ohlin model.
d. shift, but insufficient information has been provided to determine the direction of the shift.