What feature of gutenberg's invention made it so important?

When president johnson vetoed a law that would extend the freedmen’s bureau, congress reacted by supporting the veto and closing the freedmen’s bureau. writing a new law to show support for the black codes. overriding the veto and expanding the agency’s powers. drafting a law to prevent african americans from voting.

Brainliestttme : ) what are trading blocs and what is the impact of international cooperation?

*history * who was clyde ross and how was he impacted by housing discrimination?