What does this sign indicate?

What does this sign indicate?
A)The recommended maximum speed.
B)The recommended minimum speed.
C)The maximum permitted speed.Correct
The sign in the question is a maximum permitted speed sign. It prohibits travelling at a speed higher than that indicated in km/h.
Below you can see other related signs:
←Manual B de la DGT [TT/English]
←PreviousBack to QuestionsNext→