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 4 clues are 1) color change 2) the formation of gas bubbles 3) formation of a precipitate 4) temperature change. I hope this helps
The answer to you question is A. Affirm
