Latitudes 66 1/2° North and South of the Equator are important because they?

A.

are called the Arctic and Antarctic circles respectively

B.

indicate the angle of inclination of the axis of the earth's rotation

C.

mark the limits of the polar areas which experience periods of continuous night and daylight

D.

mark the equatorward limits of the occurance of precipitation in the form of snow

Correct answer is C

No explanation has been provided for this answer.