12. Following the conclusion of the Civil War, a. Americans had less free time. b. America developed a universal disapproval and dislike of cruel and violent sports like boxing. c. Americans became less involved in physical sports and games. d. Americans increasingly shared a common and standardized popular culture. e. minstrel shows lost their popularity in the South.

d. Americans increasingly shared a common and standardized popular culture.

Explanation:

After the American Civil war, there are many ways in which americans tried to reconstruct America after the Civil War

Hence, the Americans showed how they are one undivided nation. By construct a new country out of the bitterly divided states. This ensure that they look for many avenues to which makes Americans to increasingly shared a common and standardized popular culture, so as to move the nation forward. From the North to Southern Union, they all eventually work together to achieve unity.

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