To answer a question we need a who, where, what, when, where, and how. Your question leaves out who and most everything we need to answer.
True
Many jobs were unsafe (apex)
Slaves and women had the right to vote.
Both acted as a unifying force in europe
first tell us what 'the following' are.
the north opposed the extension of slavery into new states
Some are know as "Nun" Buoys
The United States imports more goods and services than it exports.
true
true
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The statement is not clear. Can you provide more context or rephrase the question?