Help Im don’t know this :)

Put the events of the cuban missile crisis in the correct sequence

Which of the following was used only once, to ratify the 21st amendment (repealing prohibition)? a.three-fourths of both houses of congress. b.three-fourths of the state legislature approved it. c.two-thirds of the state legislature approved it. d.ratifying conventions in three-fourths of the states approve it.

Identify the reason each country wanted to go to war in the year before and during world war 1