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Which risk increases when a catalytic converter's support material fractures?

A)Reduced surface area for catalysis
B)Increased exhaust back pressure
C)Premature catalyst thermal degradation
D)Enhanced oxidation reaction efficiency

💡 Explanation

Lower surface area arises because fracturing reduces exposure; therefore, catalytic conversion becomes incomplete rather than improving, because the active sites per unit volume decrease due to decreased effective dispersion related to decreased active surface area.

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