The best answer to the result of the temperance movement is: c. Prohibition laws spread across the country.
The temperance movement advocated for the reduction or elimination of alcohol consumption, which culminated in the passage of the Eighteenth Amendment in 1919, leading to Prohibition. This amendment prohibited the manufacture, sale, and transportation of alcoholic beverages in the United States. While there were other effects of the temperance movement, the spread of Prohibition laws is a significant outcome associated with it.