Can we overtake on a bend with limited visibility if the two directions of travel are clearly separated and we do not encroach on the oncoming lane?

A)No, because we do not have sufficient visibility.
B)Only if we are overtaking a two-wheeled vehicle.
C)Yes.Correct
Overtaking is prohibited on bends and crests with reduced visibility and, in general, in any place or circumstance where the available visibility is not sufficient to carry out the manoeuvre or to abandon it once begun, unless the two directions of travel are clearly separated and the manoeuvre can be carried out without encroaching on the zone reserved for oncoming traffic.