Operational Procedureshard#1043
Circadian rhythm disruption is most pronounced when crossing:
A
1-2 time zones
B
More than 3-4 time zones
CorrectC
The equator
D
The prime meridian
Explanation
Significant circadian disruption occurs when crossing more than 3-4 time zones, as the body clock takes approximately 1 day per time zone to resynchronize.
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