The controller offers the option for a take-off from a runway intersection. The pilot must be aware that
Why this is the answer
Per CAR 602.96, the pilot-in-command must ensure the operation is safe, so on an intersection take-off it is the pilot's responsibility to confirm the remaining runway length is adequate — the controller does not guarantee it.
Reference
TC AIM-RAC – Take-off Clearance CARs 602.96 – Operations at or in the Vicinity of an Aerodrome – General
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.