How shall we signal a load that protrudes from the rear of a passenger car?

A)In a passenger car, the load may not protrude from the rear.
B)With the regulatory panel for protruding loads.Correct
C)With a brightly coloured cloth.
If the load protrudes from the rear of a passenger car, during the day, in clear weather and under normal visibility conditions, it shall be marked with a 50 by 50 centimetre panel, painted with alternating diagonal red and white stripes, placed at the rear end of the load so that it remains constantly perpendicular to the axis of the vehicle.
If the load protrudes from the rear, between sunset and sunrise or under weather or environmental conditions that significantly reduce visibility, it shall be marked with the panel(s) indicated above, whose surface is reflective, and with a red light.