The MPC's Definition of Attempt Holds That a Person Is

The MPC's definition of attempt holds that a person is NOT guilty of an attempt to commit a crime if s/he,acts with the kind of culpability required for commission of the crime but [????]

A) purposely engages in conduct that would constitute the crime if the attendant circumstances were as he or she believes them to be
B) purposely commits a completed crime,then later expresses his or her regrets in writing and returns the stolen goods (or otherwise repairs the harm done) to the victim(s)
C) purposely does or omits to do anything that,under the circumstances as he believes them to be,is an act or omission constituting a substantial step in a course of conduct planned to culminate in his commission of the crime
D) when causing a particular result is an element of the crime,does,or omits to do anything with the purpose of causing or with the belief that it will cause such result without further conduct on his part