The "Land of the Midnight Sun" Is So-Named Because

The "Land of the Midnight Sun" is so-named because

A) the Sun is above the horizon for a full 24 hours at a certain time of the year.
B) the Sun passes overhead at least once during the year within this region.
C) twilight is bright and lasts all night through the summer months because the Sun never gets far below the horizon from these locations.
D) the full Moon is always up whenever the Sun sets, maintaining light skies throughout the summer months.