If a load protrudes from the rear of a passenger car, must it be marked?

A)Yes, but only at night or when there are weather conditions that significantly reduce visibility.
B)No, because it is not a vehicle intended exclusively for the transport of goods.
C)Yes, both during the day and at night.Correct
If the load protrudes from the rear during the day, in clear weather and under normal visibility conditions, it shall be marked with a panel, V-20, measuring 50 by 50 centimetres, painted with alternating diagonal red and white stripes, placed at the rear end of the load so that it remains constantly perpendicular to the vehicle's axis.
If the load protrudes from the rear between sunset and sunrise, or in meteorological or environmental conditions that significantly reduce visibility, it shall be marked with the panel or panels described above, whose surface is reflective, and with a red light.
If the load protrudes from the rear between sunset and sunrise, or in meteorological or environmental conditions that significantly reduce visibility, it shall be marked with the panel or panels described above, whose surface is reflective, and with a red light.