The Mexican American War heightened tensions over slavery in that there were many disagreements over whether the new territories won from Mexico should be free or slave territories. The Wilmot Proviso, created to solve the problem, ended up slitting parties on regional areas.
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I believe the answer to this question is C.
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Answer: The embargo caused the United States and western European countries to reassess their dependence upon Middle Eastern oil. Which basically means it led to far-reaching changes in domestic energy policy. I hope this helps!
Christians or Protestants to be more exact.