Answer:
1. False
2. False
3. False
Step-by-step explanation:
Gadsden Purchase is a 29,670-square-mile region of present-day southern Arizona and southwestern New Mexico that the United States acquired from Mexico by the Treaty of Mesilla, which took effect on June 8, 1854.
The Mexican-American War was formally concluded by the Treaty of Guadalupe-Hidalgo. The United States received the disputed Texan territory, as well as New Mexico territory and California. The Mexican government was paid $15 million — the same sum issued to France for the Louisiana Territory.
The belief in Manifest Destiny helped gain public support for the war despite criticism of Polk's use of executive power and warnings from abolitionists that additional slave states would be created out of the soon-to-be-acquired Mexican lands.