What is the recommended course of action if you hear a siren nearby but cannot see where the emergency vehicle is?

A) Pull over to the side of the road and stop until the source of the siren is visible.
B) Continue driving at a steady speed to avoid causing congestion on the road.
C) Increase your speed to quickly get out of the way of the emergency vehicle.
D) Change lanes frequently to maximize your chances of seeing the approaching vehicle.
E) Ignore the siren and continue driving as usual.