Taking into account seasonal climatic variations and geographical area, private aeroplanes and helicopters flying VFR 25 NM or more from an aerodrome or operating base may require
Why this is the answer
Per CAR 602.61, VFR flights 25 NM or more from an aerodrome may, depending on season and area, require specified survival equipment to be carried. The radio and multi-engine options are not what this rule mandates.
Reference
CARs 602.61 – Survival Equipment – Flights Over Land
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.