When there is no traffic signal, vehicles must stop for pedestrians in a crosswalk when:

• The pedestrian is on the half of the roadway the vehicle is traveling on.
• The pedestrian is approaching from the nearest lane on the other half of the roadway.
• The pedestrian is on the opposite side of the road, far from the vehicle.
• Both A & B
  Explanation:

  "When there is no traffic signal, vehicles must stop for pedestrians in a crosswalk, whether marked or unmarked, if the pedestrian is on the same half of the roadway as the vehicle or approaching from the nearest lane on the other half."