In 1850s, the main occupation of the people arriving in Oregon and California is gold mining. Thus, the answer is letter B. In May of 1848, a newsletter proclaimed about the gold mines found in the lands and many people from the neighboring places flocked to the place.
<u>Original Question: </u><u><em>Which of the following groups would most likely live in a tenement?</em></u>
<u></u>
<u>Answer: Choice (D)</u> or <u>A poor immigrant</u>
<u></u>
<u></u>
<em>Reason: Tenements were essentially extremely small apartments that made up one entire house that was often rundown but cheap. This was particularly appealing to immigrants who often had little money coming into the US, however for a boss, a manager, or a magnate, would often own a house since they generally had more money and disdained living in tenement</em>
<em />
Hope that helps!
The development of a better way to produce iron cheaply.