Final answer:
The option among the given internal migrations in the United States that was not voluntary is 'E) the Trail of Tears', which refers to the forced removal of several Native American tribes from their ancestral lands.
Step-by-step explanation:
In the context of U.S. History, the five alternatives presented relate to significant movements of populations within the United States, however, the option that does not belong in the list of voluntary migrations is 'E) the Trail of Tears'.
The 'Trail of Tears' relates to the forced removal of the Cherokee Nation, along with several other Native American tribes, from their ancestral lands in the southeastern United States to lands west of the Mississippi River during the 1830s. This was not a voluntary migration, but a result of enacted policy.
Options A), B), C) and D) all describe other known periods of voluntary internal migrations—in search of opportunities or for economic reasons—within the U.S. For instance, 'the westward expansion of the frontier' relates to the move of settlers westwards during the nineteenth century, driven by the idea of Manifest Destiny.
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