Not steel it is wrong

Which of these statements best describes the ambiguity in this excerpt

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.

In what was the 1851 indian appropriations act considered a peace plan according to the federal government