What must the driver of a passenger car do to join traffic?

What must the driver of a passenger car do to join traffic?
A)Only signal the manoeuvre, because the others must yield.
B)Always follow the instructions of another person.
C)Make sure they can do so without danger to other users.Correct
The driver of a vehicle stopped or parked on a road, or coming from access roads to it, from its service areas or from an adjoining property, or from an exclusively private path, who intends to join traffic, must first ensure, even by following the instructions of another person if necessary, that they can do so without danger to other users, yielding to other vehicles and taking into account their position, trajectory and speed, and shall give warning with the signals required for these cases.