What does this sign indicate?

A)Danger due to the possible presence of obstacles on the road.

B)Danger due to the proximity of a section whose surface may be very slippery because of ice or snow.

C)Danger due to the proximity of a section of road whose surface may be very slippery.Correct

Danger due to the proximity of a section of road whose surface may be very slippery.
The cause is not specified.