In a built-up area, when there is no space reserved for pedestrians, where will they walk?

In a built-up area, when there is no space reserved for pedestrians, where will they walk?
A)On the right or on the left, according to the specific circumstances of traffic, the road or visibility.Correct
B)On the right in relation to their direction of travel.
C)As a general rule on the left, in order to better perceive vehicles approaching from the front.
Every pedestrian must walk on the right-hand pavement in relation to their direction of travel.
If there is no space specifically reserved for pedestrians, as a general rule, within a built-up area pedestrians may walk either on the left or on the right according to the circumstances of the road or visibility. Outside built-up areas, pedestrians will walk on the left, unless it is safer to do so on the right.