By Which of the Following Means May an Agency Relationship

Multiple Choice

By which of the following means may an agency relationship be terminated?

A) Fulfillment of purpose
B) Occurrence of a specific event
C) Revocation of authority
D) Fulfillment of purpose, occurrence of a specific event, and by revocation of authority
E) Fulfillment of purpose and occurrence of a specific event, but not revocation of authority.