Which error increases in prolonged use of a cast-brass astrolabe?

💡 Explanation

Prolonged use can deform an astrolabe's pivots, leading to inaccuracies in angle readings due to mechanical creep, specifically manifested as limb angle inaccuracy, because the cast brass slowly changes shape under stress; therefore, the limb angle becomes degraded rather than undergoing catastrophic failure immediately due atmospheric corrosion as implied by C.

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