Joining the public road from a building must be done...

A)giving warning with the horn and hazard lights.
B)quickly so as not to obstruct pedestrians and vehicles.
C)at a speed that allows immediate stopping, and giving way to pedestrians and vehicles.Correct
As a general rule, joining the road from a stopped or parked position, from a service area or adjacent property, shall be carried out:
- Without being an obstacle to other drivers and road users, to whom you must give way, taking into account their position, trajectory and speed.
- Without causing a sudden swerve in those who are approaching while in motion.
- At an appropriate speed.
- Taking special care with pedestrians using the hard shoulder or pedestrian areas, to whom you must give way.