Which of the Following Is True About a Petit Jury

Which of the following is true about a petit jury?

A) There are typically twelve members in a petit jury in criminal trials.
B) It does not determine guilt or innocence.
C) It is a body of citizens examining whether someone accused of a crime should be formally charged.
D) It serves as a procedural step to prevent prosecutors from abusing their powers of arrest and indictment.
E) The petit jury requirement exists at the federal level and in some,but not all,states.