What are the characteristics of the landing area for horizontal jumps?

I - The landing area must have a minimum width of 2.75 m and a maximum of 3 m.
II - The landing area should be filled with fine damp sand and the surface of the sand should be at the same level as the take-off board.
III - The center of the take-off board should coincide with the center of the landing area.
IV - If the axis of the take-off board is not in line with the center line of the landing area, a tape should be placed along the landing area.
a) Only I and II are correct.
b) Only II and III are correct.
c) Only III and IV are correct.
d) All statements are correct.