B. Ascertained.
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The theme develop because in the whole story it's basically tell us to listen and follow directions this why we will have a better chance of doing things and a better outcome
Answer:
The Gold Rush
Explanation:
Take the Gold Rush for an example. Many people traveled on long journeys to migrate to California because of the gold. The gold promised a lot of freedom, safety, and a brighter future. Migration isn't all sunshines and rainbows though. One example was the Trail of Tears where many native americans were forced by Colonizers to move to different plots of land, leaving behind their homes.
