Which consequence results when zenith distances exceed instrument limits on early astrolabes?

💡 Explanation

Observations become impossible because the physical instrument's design leads to LINE-OF-SIGHT obstruction when very high zenith distances (low altitude objects relative to horizon) lead to targets being physically below limb level; therefore options A, B, and D won't result, rather than C, due structural considerations.

• Which structural weakness increased in 18th-century warships when builders rapidly cured timbers using kiln drying?
• Which material advantage caused a temporary shift in Byzantine diplomatic power via *chemical intimidation*?
• Which risk increases when ropes of a Viking rope bridge experience extended periods of high humidity plus submersion events?
• During sieges involving Greek Fire against Byzantine fortifications, which countermeasure proved most critical when stone walls experienced prolonged direct flames?
• Which consequence resulted when ancient Cusco's fit with clay mortar failed?
• Which outcome results when sustained tensile loading exceeds creep limits within Viking longship rigging?