Answer:
Dred Scott said he would be free because he lived in Wisconsin, a free state.
Step-by-step explanation:
Dred Scott was an African- American slave who would become famous for the unsuccessful attempt to sue the government against unjust discrimination. This case would later become the famous Dred Scott v. Sandford (1857).
Dred Scott was born enslaved under Peter Blow and lived in Alabama and Missouri, both slave states. Later on, he was sold to an army surgeon, Dr. John Emerson who took him wherever he's posted. Later on, they'd shift in-between states, both getting married to their wives.
According to the law, slaves who are intentionally withheld for an extended period by their masters even in free states have the right to be free. So, when Dred Scott and his wife Harriet Robinson asked for their freedom, they were refused. It was then that Dred Scott claimed he is a free man as he lived in Wisconsin which is a slave-free state, a state that illegalizes slavery.