<span><span>1. </span><span>Nullification doctrine is said that the
states residing within the Union is undocumented. Supposed Aliens and sedition
acts was passed to punish those who opposed the federal laws and regulations. However,
it was Thomas Jefferson who thought that this act may affect the Bill of Human
rights, so he decided to make an equally unconstitutional doctrine that states
if a government would implement a law, a state could refuse to follow it. John Calhoun, soon adapted the Nullification
doctrine</span></span>
The Arab nations of OPEC placed the embargo on the United States as a response to US support of Israel in its 1973 war against a coalition of Arab states led by Egypt and Syria.
OPEC stands for the Organization of Petroleum Exporting Countries. Within that, there was also the Organization of Arab Petroleum Exporting Countries (OAPEC), formed in 1968. In 1973, OAPEC said they would cut oil production <span>"until the Israeli forces are completely evacuated from all the Arab territories occupied in the June 1967 war." (The 1973 war was being fought to regain control of territories lost to Israel in 1967.) Egypt and Syria were both members of OAPEC, and they and other Arab nations were seeking leverage in the struggle with Israel and positioning for post-war settlements.</span>
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The states were also given a chance to propose changes or amendments. Three-fourths of the states have to approve the amendment for it to become a law. In the past 200 years, the constitution has been amended 27 times. The 13th amendment, in 1865, forever banned the practice of slavery.
I hope this helped you.