<span>b. Masters were allowed to kill their own slaves, if they had a reason for doing so.
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Because they had enough strong government under the British.
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The Calhoun doctrine shows that Calhoun wanted states to have the right to nullify national laws
Answer:
USA(republican and democrative) have 2 party system
B) Preventing the spread of communism
The role of the united state in Vietnam war began after the world warII. US mission was to restrict the communist domination that was present in Vietnam government, this was because communism could easily spread to the Neighbouring countries which would result to a change in the balance of power throughout Southeast Asia.