What is the central idea of this selection?
A Human perception of time has long remained unchanged.
B Mechanical clocks are the most accurate measures of time.
C Scientists have developed many ways to measure time.
D Light travels faster than sound.
What is the central idea of this selection?
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The central idea of this selection is C Scientists have developed many ways to measure time.
This option captures the main focus of advancements in understanding and measuring time, highlighting the various methods created by scientists throughout history. The other options either narrow down the topic or present specific attributes rather than the overall concept.
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