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Which outcome arises from thermal expansion within a brass framed 18th-century sextant used at sea?

A)Increased measurement inaccuracy due to arc distortion
B)Decreased weight from material sublimation
C)Enhanced stability from material hardening
D)Corrosion weakening from galvanic activity

💡 Explanation

When ambient temperature changes, thermal expansion of the brass arc occurs because metallic materials expand with heat, resulting in physical distortion, and affecting angular measurement accuracy. Therefore, increased measurement inaccuracy results rather than weight loss, stability enhancement,or galvanic corrosion which require different influencing factors.

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