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C is the correct answer. Made of wood.
We see that the obstacles that the people that found gold in California during the Gold Rush faced are: D. Traveling over land or sea and living in mining camps.
<h3>What is the California Gold Rush?</h3>
The California Gold Rush was actually known as a period when there was rapid movement of treasure seekers who came to California when gold was discovered at Sutter's Mill. It began in early 1848. It's estimated that over 300,000 came to that territory.
The challenge the people faced were travelling long distances to California over land and sea and also living in mining camps.
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18 is the answer I believe you are looking for
