Municipal urban forestry regulations require that any city park plot designated as an ecological reserve must undergo annual soil remediation. No park plot that undergoes annual soil remediation is treated with synthetic nitrogen fertilizers. In the district of Elmhurst, every municipal park plot that features an artificial wetland is designated as an ecological reserve. Currently, several park plots in Elmhurst are treated with synthetic nitrogen fertilizers.
If the statements above are true, which one of the following must also be true?
- AEvery park plot in Elmhurst that does not undergo annual soil remediation is currently treated with synthetic nitrogen fertilizers.
- BAll municipal park plots in Elmhurst that undergo annual soil remediation feature artificial wetlands.
- No municipal park plot in Elmhurst that features an artificial wetland is treated with synthetic nitrogen fertilizers.Answer
- DAny municipal park plot that undergoes annual soil remediation is designated as an ecological reserve.
- ESynthetic nitrogen fertilizers cause greater ecological disruption to park plots than the absence of annual soil remediation does.
Answer
No municipal park plot in Elmhurst that features an artificial wetland is treated with synthetic nitrogen fertilizers.
The correct answer follows directly from linking the conditional premises: in Elmhurst, an artificial wetland guarantees that the plot is an ecological reserve (Wetland → Reserve); an ecological reserve guarantees annual soil remediation (Reserve → Remediation); and annual soil remediation guarantees that no synthetic nitrogen fertilizers are applied (Remediation → No Fertilizers). Combining these yields Wetland → No Fertilizers, proving that no municipal park plot with an artificial wetland can be treated with synthetic nitrogen fertilizers.
Step-by-Step Solution
Key Concept
Conditional Logic Chaining and Deductive Inference
Estimated Time:1m 15s