What was the primary reason for the early popularity of these labor
organizations?

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

explanation:

health and medicine because people are dying from not being healthy or not strong enough medicine

the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation.

the passage of a strict fugitive slave law