Roadwork signs...

A)have a different symbol and size from those used on sections without roadworks.
B)establish a reduction of the maximum speed by 10 km/h for roadwork sections.
C)have the same meaning as those used on sections without roadworks.Correct
The meaning of roadwork signs shall be the same as that of the equivalent signs used when there are no roadworks, as well as their shape, design, symbols, meaning and dimensions.