My two kroner worth
A and C are not going to be a favorite for this one since they are aiming for Induced drag.
Since they want something that gives you the most drag (likely to be induced drag) then you´d have to select a speed that´s very low and the ones I see there are Vs1 (which is pretty slow) and the other option D). I´m inclined to go for D in this matter but no expert here.