John Hired Alex to Fly to California and Drive Back

Multiple Choice

John hired Alex to fly to California and drive back a new car he purchased.Alex successfully drove the car back and John was satisfied with Alex's services.Has the agency relationship terminated?

A) Yes,by mutual agreement of the parties.
B) No,John must put the termination in writing.
C) Yes,by lapse of time.
D) No,John must put the termination in form of a publication.
E) Yes,by fulfillment of purpose.