What Are the Elements of the Crime of Conspiracy

What are the elements of the crime of conspiracy?

A) A crime is committed; by two or more people who agreed to commit a crime
B) An agreement to commit a crime by two or more people; an overt act toward committing the act by one or more of the actors
C) A discussion by the co-conspirators about how to commit the crime
D) Expression of desires to commit a type of crime by co-conspirators; agreement to consider a plan that does not have to be acted upon in any substantial manner