There are tons of antonyms for credible out there, but really good ones include deceptive, dishonest, undependable, unreasonable, etc...
Hope this helped!!!!!
The answer would probably be the “Freedom Riders”, who challenged segregation on public transportation throughout the South.
Answer:
It allowed the people of the Oklahoma and Indian territories to draft a state constitution and petition Congress for admission to the Union as one state
Serbia supported the assassination