Stephanie, who lives in California, is preparing to compete in track and field at the Olympics in London. She plans to arrive in London
A. two weeks before competing, because her peripheral clocks in her muscles and lungs take longer than her SCN to adjust to a new time zone.
B. two weeks before competing, because her SCN requires this time in order to adjust to the new time zone.
C. a couple of days before competing, because her SCN and peripheral clocks only require a short time to adjust to the new time zone.
D. a couple of days before competing, because eastern travel is easier on her SCN and peripheral clocks than the western travel she experienced competing in Beijing.
Answer: A
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