On the 18th amendment, the Supreme court stated that states must ratify a proposed amendment 'within reasonable time', but the time never been specifically defined
For the 18th, 20th, 21st , and the 22nd amendments, The congress set the ratification processing period at 7 years
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The wheel and horse-<span>drawn chariot had been invented. I'm pretty sure about this but good luck :)</span>
The greatest unifying force of the ottoman empire was a common religion.
D. To research its historical background and original purpose
This gives you the information and reason behind the work and explains where it comes from