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At Chichen Itza, which risk increased as limestone structures underwent repeated cycles of rainwater infiltration and evaporation?

A)Catalytic mineral alteration
B)Increased structural alkalinity
C)Accelerated joint dissolution
D)Decreased surface impermeability

💡 Explanation

The risk is accelerated joint dissolution because rainwater's carbonic acid dissolves calcium carbonate in the porous limestone; the mechanism is carbonation. This leads to widening cracks within adjacent stones, therefore, structural integrity degrades rather than remaining stable.

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