If we are driving at 70 km/h in the centre lane and there is no other traffic on the roadway, are we doing it correctly?

A)Yes, because I am driving at a speed lower than the maximum indicated.
B)Yes, because I can drive in the lane that best suits my destination.
C)No, I will have to drive in the right-hand lane.Correct
On roads outside built-up areas, as a general rule we will drive in the right-hand lane, and we may use the other lanes when traffic conditions require it.
The sign shows us that the road has three lanes and that in the right-hand lane the maximum speed is 80 km/h; since our speed is 70 km/h, we must use this lane.
If we increase our speed and drive at more than 80 km/h, we must compulsorily drive in the centre or left lane, since we would exceed the limit of the right lane.
If we increase our speed and drive at more than 80 km/h, we must compulsorily drive in the centre or left lane, since we would exceed the limit of the right lane.