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Which mechanism significantly reduces buckling in tall, slender concrete columns?

A)Increased lateral bracing stiffness
B)Decreased concrete aggregate size
C)Reduced axial load eccentricity
D)Greater longitudinal rebar spacing

💡 Explanation

Increased lateral bracing stiffness prevents lateral displacement and thus increases the critical buckling load, because the Euler buckling formula demonstrates its inverse relationship with effective length; therefore, bracing stops bending rather than altered composition.

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