单选题Which of the following does an astronomical time clock do？（）ADetermines the ambient light at night with a photocell.BCalculates sunset and sunrise times based on geographical area.CDetermines the start and end of each of the seasons.DSynchronizes the local time displayed with the official world time.
单选题
Which of the following does an astronomical time clock do？（）
A
Determines the ambient light at night with a photocell.
B
Calculates sunset and sunrise times based on geographical area.
C
Determines the start and end of each of the seasons.
D
Synchronizes the local time displayed with the official world time.
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