4.

Which action would be consistent with a person who believed in civil disobedience?

an angry citizen setting fire to a government building

a Know-Nothing Party member attacking an immigrant

a conductor on the Underground Railroad guiding escaped slaves

a merchant banker who got wealthy by extending credit

A person who believed in civil disobedience would likely engage in peaceful, nonviolent protests or acts of resistance against laws or policies they deem unjust. Therefore, the action consistent with a person who believed in civil disobedience would be "a conductor on the Underground Railroad guiding escaped slaves."