Martha Is Flying from Chicago to Stockholm in a Month

Martha is flying from Chicago to Stockholm in a month.What would you tell her about "jet lag"?

A) She should be exposed to bright light late the first evening she is in Stockholm to reset her circadian rhythm.
B) She should begin now to preadapt her sleep-and-waking cycle to Stockholm time.
C) When she arrives in Stockholm, she needs to stay indoors and eat and sleep on Chicago time until her body adapts.
D) She should use over-the-counter sleep aids in order to get to sleep in Stockholm the first few nights.