A is pointing to what structure? 
Definitions:
Vergil's Aeneid
An epic Latin poem by Virgil, narrating the legendary story of Aeneas, a Trojan who traveled to Italy and became an ancestor of the Romans.
Labor Supply Curves
Graphical representations showing the relationship between the wage rate and the quantity of labor workers are willing to supply.
Mexican Workers
Individuals from Mexico who may work either in their home country or abroad, contributing to various sectors of the economy.
United States
A federal republic consisting of 50 states, a federal district, and several territories. It is located primarily in North America.
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