The Mexican war helped the United States to gain control of new western lands and
A) created a free trade zone with Mexico
B) provided the reservation system for Native Americans
C) lead to the establishment of the Northwest Ordinance
D) establish boundaries with Mexico

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Explanation:

The Mexican War helped the United States to gain control of new western lands and  establish boundaries with Mexico.

D. establish boundaries with Mexico

Explanation:

In addition, the United States took over $ 3.25 million of debt that the Mexican government owed to U.S. citizens

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation: