This sign indicates...
A)turning left is prohibited and you must continue straight ahead.
B)the existence of a dead-end road on the left.
C)danger due to the proximity of an intersection with priority over the road on the left.Correct
The sign in the question indicates danger due to the proximity of an intersection with a road on the left whose users must give way. That is, we — who see the sign facing us — have priority.
Other signs related to answers b) and c):