Jenkins Once Told Chang About the Relationship Between Motive and Opportunity

Jenkins once told Chang about the relationship between motive and opportunity, what was that piece of information he shared with her?

A) Look first to motive and work backwards
B) Look first to opportunity and work backwards
C) Motive becomes irrelevant if one does not have the opportunity
D) Choice 'a' and 'c' are correct
E) Choice 'a' and 'b' are correct