CARs state that after the consumption of any alcoholic beverage, no person shall act as a crew member of an aircraft within
Why this is the answer
CAR 602.03 sets the "bottle-to-throttle" rule: no person shall act as a crew member within 12 hours after consuming an alcoholic beverage (and never while under its influence). The longer 24/36/48-hour options exceed what the regulation actually requires.
Reference
CARs 602.03 – Alcohol or Drugs – Crew Members
Question reproduced verbatim from Transport Canada’s PSTAR Study and Reference Guide (TP 11919E). The answer key is Transport Canada’s; the explanation is ours.
A study aid — not a substitute for the official guide, the CARs, or your instructor.