APFIVE Catalytic Converter CO Reduction Data
Which of the following pieces of evidence best supports the conclusion that catalytic converters reduce CO emissions by converting carbon monoxide to carbon dioxide?
| Time (min) | CO without Converter (ppm) | CO with Converter (ppm) |
|---|---|---|
| 0 | 100 | 100 |
| 10 | 90 | 70 |
| 20 | 80 | 50 |
| 30 | 70 | 35 |
A
The measurements demonstrate an initial increase in CO levels before a converter is applied, implying that the converter generates more CO.
B
The data exhibit random fluctuations in CO concentration, making it impossible to ascertain any effect from the catalytic converter.
C
The table shows a significantly steeper decline in CO levels when a catalytic converter is used, consistent with its function of converting CO to less harmful substances.
D
The data indicate similar CO reduction rates with or without a catalytic converter, suggesting a negligible impact on emissions.
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