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← ScienceWhich outcome occurs when a catalytic converter deactivates?
A)Increased harmful exhaust emissions result✓
B)Improved engine fuel efficiency happens
C)Decreased engine operating temperature occurs
D)Enhanced regulation of air-fuel ratio happens
💡 Explanation
Increased harmful exhaust emissions result because catalyst deactivation reduces oxidation-reduction efficiency. This is due to catalyst poisoning, rather than improved fuel efficiency or regulation, because those require a fully functional converter.
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