It was Plessy v.
<span> Ferguson</span> that upheld the doctrine of "separate but equal" this decision was later overturned by the landmark case of Brown v. Board of Education.
B) Dred Scott
Hopefully this helped you out
He wanted to build up the nation's army and navy is the statement among the statements given in the question that was one of the policy changes Thomas Jefferson made when he became president. The correct option among all the options given in the question is the last option or option "D".
Franz ferdinand was in a way a set up, it was meant to start the war, some people were trying to get "revenge" and do it in a way were the spot light wouldnt be on them