Congress had decided that once a slave traveled into a free state, they were free and they could never be enslaved again. But in the Dred Scott decision, they changed their mind and people no longer had to honor "once free, always free."
Hope this helps!
Catherine can be described a such because she had no constitution for her country. She ruled by her own decision not by a written code. Her laws had to be upheld. She herself quoted that, "The Sovereign is Absolute."
hope that helped;P
B. Constitution
...is the answer to your question :)
The Indians? Or this is a very confusing question.
Sorry if I'm to late but I thinks it's c. Many couldn't speak English and had no skills. Hope this helps ;)