This sign indicates that the lanes over which the minimum speed signs are placed...
A)may only be used if you are travelling at a speed lower than that indicated.
B)are for fast vehicles and the lane furthest to the right is for slow vehicles.
C)may only be used if you are travelling at a speed equal to or greater than that indicated.Correct
The sign in the question indicates that the lane or lanes over which the minimum speed sign is placed may only be used by vehicles travelling at a speed equal to or greater than that indicated, although if circumstances allow they should travel in the right-hand lane.