Concept:The South Pole experiences continuous darkness during the period when the Southern Hemisphere is tilted away from the Sun.Explanation:At the South Pole, the Sun sets around the March equinox and remains below the horizon until the September equinox.This period of polar night lasts from about March 21st to September 22nd of the same year.During this time, the South Pole receives no direct sunlight.Answer:B. March 21st to September 22nd of the same year