What is the meaning of optics

The 14th amendment overruled the supreme court case of dred scott vs. sandford. the landmark supreme court case determined which of the following points? a.slaves could not be citizens b.non-landowners could not be citizens c.blacks could not be citizens d.all persons born or naturalized in the united states vary differently in citizen status.

Which of the following describes the branches of government in china? a executive b state council c judicial d premier e legislative f npc g ministers of state

What new concept did the the american revolution introduce into the world