Where did the arrival of General Zachary Taylor's troops spark the start of the Mexican-American War? A the Nueces River
B the California territory
C the Rio Grande River
D the Alamo

C. North of the Rio Grande River

Explanation:

Before the United States formally declared war on Mexico, General Zachary Taylor defeats a superior Mexican force in the Battle of Palo Alto north of the Rio Grande River. The drift toward war with Mexico had begun a year earlier when the U.S. annexed the Republic of Texas as a new state.

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explanation:

i belive the classic sword and a shield would do