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Which consequence resulted from thermal expansion impacting the accuracy of navigational sextants onboard 18th-century wooden ships?

A)Increased error measuring celestial angles
B)Reduced structural integrity of the frame
C)Disrupted magnetic compass readings
D)Corrosion of reflective index mirrors

💡 Explanation

When sextants experienced thermal expansion, dimensional changes of the instrument altered the alignment between mirrors and telescope angles influencing celestial angle measurements causing systematic error. Therefore, increased angular measurement errors resulted, rather than structural failure, compass disruption, or direct mirror corrosion which result from other mechanisms.

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