What does this sign indicate?

What does this sign indicate?
A)Danger due to the proximity of a section in which traffic is stopped or hindered by traffic congestion.Correct
B)Danger due to the proximity of a section in which traffic is hindered by a notable loss of visibility.
C)Obstruction on the road.
This sign indicates the proximity of a section in which traffic is stopped or hindered due to traffic congestion. Do not confuse with the following signs: