A pilot on a VFR flight is being vectored by ATC towards an extensive unbroken layer of cloud. The responsibility for remaining VFR rests with
Why this is the answer
Per the radar-navigation-assistance rules (TC AIM-RAC), responsibility for remaining VFR rests with the pilot even while being vectored. ATC vectors do not transfer the duty to stay clear of cloud.
Reference
TC AIM-RAC – Radar Navigation Assistance To VFR Flights
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.