What Is the Difference Between a Court of First Instance

What is the difference between a court of first instance and an appellate court?

A) An appellate court hears a matter for the first time, a court of first instance hears an appeal from a previous decision.
B) Nothing as they are the same thing.
C) A court of first instance hears a matter for the first time while an appellate court hears an appeal from a previous decision.
D) All of the above.