Multiple Choice
Leap years- years that contain an extra day-are necessary because
A) Earth's speed of revolution along its elliptical orbit varies throughout the year.
B) 365 days is not exactly divisible by four.
C) the rotation rate of Earth varies, leading to days of different length during the year.
D) the length of a year is not an exact number of days.
Correct Answer:
Verified
Correct Answer:
Verified
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