What does this panel indicate to us?

A)It indicates information that we may or may not heed.
B)It indicates a danger and the obligation to carry chains.Correct
C)It indicates an obligation.
The panel in the question indicates danger due to slippery pavement and the obligation not to continue driving without snow chains or other authorized devices, which act on at least one wheel on each side of the same drive axle.
We may continue driving when we have one of the following authorized devices installed:
- Snow chains.
- Other authorized devices, such as textile covers.
- Winter tires (M+S), special for snow and mud.
- Studded tires, which must have rounded edges and not protrude from the surface more than two millimeters.
- Snow chains.
- Other authorized devices, such as textile covers.
- Winter tires (M+S), special for snow and mud.
- Studded tires, which must have rounded edges and not protrude from the surface more than two millimeters.