What Finally Led Mexico to Break Off Diplomatic Relations with the United

Multiple Choice

What finally led Mexico to break off diplomatic relations with the United States and prepare for armed conflict?

A) The Republic of Texas began claiming land south of the Rio Grande.
B) The United States annexed Texas and claimed the land between the Nueces River and the Rio Grande.
C) The U.S. military began fighting for control over California harbors.
D) The U.S. government refused to grant rights of citizenship to people of Mexican descent living in Texas.
E) President Polk criticized the Mexican government in a scathing public address.