Answer: The Mexican-American War
Explanation: The annexation of Texas contributed to the coming of the Mexican-American War (1846-1848). The conflict started, in part, over a disagreement about which river was Mexico's true northern border: the Nueces or the Rio Grande.
Answer: Yes
Instead of just assuming Cuba of exploding it, the United States should investigate the explosion.
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Answer: Well an atom is a Particle, a Scientific theory is a a carefully thought-out explanation for observations of the natural world that has been constructed using the scientific method.
Answer:
the early groups where found already
Explanation: