Which of these statements is a correct description of the rotation of Earth?
A) The average length of a day is gradually getting longer because Earth's rate of rotation is slowing down.
B) The average length of a day varies unpredictably from one year to the next because of the combined effects of solar and lunar tides.
C) The average length of a day is gradually getting shorter because Earth's rate of rotation is speeding up.
D) The average length of a day is constant from year to year because nothing can change the speed of rotation of Earth.
Correct Answer:
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