The correct answer is option A.
Slavery was abolished in 1833 thorough out the British empire.
Women´s suffrage guaranteed by the 19th amendment in 1920.
Prohibition ends ratified in 1933 by the 21st amendment which brought an end to the national prohibition of alcohol in The United States.
18-year-olds guaranteed suffrage in 1970 by the 26th amendment, which also prohibits states from discriminating among voters based on age, for people who are at least 18 years old.