Why might many of the states that bordered the Union have decided not to secede?

Apex plz i’m almost done if i get this all right

All of the following changes typically happened in colonies as a result of imperialism, except: a. cultural practices were outlawed. b. they became more economically self-sufficient. c. european nations built modern infrastructure, including railways. d. the european language became the language of government and education.

There are no written records of the first migration of humans to the americas? true or false