Part A: Working hours changed from around 14 hours a day before the 1880's to being reduced slowly down to 12, then 10, eventually moving to an 8 hour day. This change allowed for workers to to have more time to sleep and for leisure. Another change was the end of child labor. Similar to the decrease in hours, the minimum age increased over time as well moving from 10 to 16.
Part B: One strategy used by unions to achieve these goals were strikes. Workers would leave the job and picket outside of a job which shut down operations. This tactic did not work at first because there were plenty of workers to fill the jobs. However, when immigration slowed the tactic had more impact with no people to fill the jobs. Some strikes were so large they brought the attention of police forces and the government.
After Italy had agreed to switch sides and help defeat the Entente, they thought they deserved more, being one of the Big Four. Great Britain promised to give them a few of the Slavic countries, but they had other plans to make a large Slavic country known later as Yugoslavia. So, Italy was unhappy because they got cheated by Great Britain.
Ended the French and Indian War/Seven years war between Great Britain and France. France gave up all its territories in mainland North America, effectively ending any foreign military threat to the British colonies.
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It would be "the Environmental Protection Agency" that primarily deals with domestic policy issues, since this agency protects the environment of the United States.