The gem theory, which helped people understand the cause for some diseases, has also helped the spread of these diseases, which in turn increased the length and quality of people's lives.
Most accurate would be the second choice as it addresses the US Goverment. If I'm incorrect please do let me know :) I'd look for a second source of this information though.
Back in the 1800s nobody cared at all until around the 1940s where people noticed there were too many people coming in 2000s immigration is illegal unless with paperwork
