Which of the following is NOT listed as a challenge for water management in Greater Mexico City?

• A. Groundwater overexploitation
• B. Land subsidence
• C. Abundant wastewater treatment
• D. Limited cost recovery

Answer: (C)

The main idea here is distinguishing what is actually a challenge in managing water for Greater Mexico City. In this region, problems commonly cited include pumping groundwater faster than it can be replenished, which causes land to subside and damages infrastructure. Another big issue is limited cost recovery—water services are often underpriced or subsidized, making it hard to raise money for operation, maintenance, and upgrades. Abundant wastewater treatment, on the other hand, would be a positive condition and is not described as a challenge in discussions of the area’s water management. In reality, wastewater treatment capacity tends to be limited and sometimes inadequate, so the statement that treatment is abundant does not reflect the documented problems. That’s why it’s the option that is NOT listed as a challenge.