NOTAMs are
Why this is the answer
Per the TC AIM, NOTAMs are available at all flight information centres (FIC). They are not emailed to every pilot, are not limited to facility closures, and have no fixed 24-hour validity.
Reference
TC AIM-MAP – NOTAM Distribution – Canadian
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.