Pedestrians walking at night on a road outside a built-up area must carry a...

A)red reflector (cat's eye), visible from a distance of at least 50 metres.
B)mobile phone.
C)luminous or reflective element that can be seen from a distance of at least 150 metres.Correct
Outside built-up areas, between sunset and sunrise or in meteorological or environmental conditions that significantly reduce visibility, every pedestrian walking on the carriageway or hard shoulder must be equipped with a luminous or retroreflective element that can be seen from a distance of at least 150 metres.