The load carried in a vehicle must be arranged in such a way that...

A)it occupies the minimum possible space.
B)it does not obscure the lighting devices, although it may obscure the light-signalling devices.
C)it does not obscure the lighting or light-signalling devices.Correct
The load and the accessories used for its securing or protection must be arranged in such a way that they do not obscure the lighting or light-signalling devices, nor the manual signals of the drivers.