What does this sign indicate?

A)That vehicles approaching from the opposite direction will not have priority at the narrowing.
B)That drivers approaching from the opposite direction have priority over vehicles travelling in the opposite direction.Correct
When approaching a narrow passage, depending on the side from which we approach, we may find one of the two signs below.
The first one, which is the one in the question, tells us that we have priority over vehicles travelling in the opposite direction.
The second one, on the other hand, would indicate that the opposite direction has priority and forbids us from entering the narrow passage as long as it is not possible to cross it without forcing vehicles travelling in the opposite direction to stop.