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Which risk increased with suspension bridge rope improvements?

A)Undulation due to aerodynamic instability
B)Material fatigue due to increased stress
C)Electrolysis due to dissimilar metal joints
D)Buckling due to compressive force

💡 Explanation

Suspending larger spans was plausible when better ropes appeared; increased length made Resonance, therefore undulation more likely, rather than simple breakage or galvanic corrossion because these were already understood limitations.

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