In view of the sign and considering that we are driving at 90 km/h, can we use the right-hand lane?
A)No, because it is reserved for slow vehicles.
B)Yes, as a general rule we will use the right-hand one.Correct
C)We will use any lane indistinctly.
The sign in the question indicates that the lane or lanes on which the minimum speed sign is located may only be used by vehicles travelling at a speed equal to or greater than that indicated, although if circumstances permit they must travel in the right-hand lane.