A primary source of anything is a first hand account be it a diary, eye witness account, the person must have experienced it themselves while a secondary the information could have been passed on for example a news paper or memoir on someones life.
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A because most people don't understand people that have a accent or that's from different places. So most likely they use them to communicate with their people
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The toll addiction takes on a person’s life — family, friends, career, emotional and physical health, finances and personal safety — is staggering. Right now, more than 21 million Americans have some sort of substance abuse disorder. Despite the crushing effects addiction can have, only one person in every five of those suffering receives the help they need.
Many people were mining for gold, silver, and oil during the 1800s to gain wealth and fame. So there were definitely many miners during the 1800s. Many people needed to put their valuables in banks. So there were also a lot of bankers, doctors, lawyers, ministers, and many other "White Collar" jobs.
They started using billboards i believe hope that helps
