Which laws enacted immediately after the civil war were designed to maintain the social structure of slavery?

The Black Codes were enacted immediately after the Civil War which were designed to maintain the social structure of slavery.

Explanation:

The slavery that was prominent in the southern state didn't end immediately after the American Civil War. In fact, the steps taken to abolish slavery in the southern states right after the Civil War gave a major setback to the regional economy.

To avoid further economic loss of the states, Black Codes were implemented to allow slavery to some extent.

it provided for equal trade rights among nations in china.

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.