What was Prohibition?

a
Prohibition was the time when stores and bars could sell alcohol only before 4 pm.
b
Prohibition was the time when Progressives wanted the state and national governments to ban the production and sale of alcoholic beverages.
c
Prohibition was the time when the "wets" and the "drys" fought over whether liquor could be sold by the government.
d
Prohibition was the time when every state voted to ban alcoholic beverages.