Task: Reasoning / MCQA
User instruction:
The 300-unit apartment complex GreenVille aims to raise its recycling rate from the current 50 % to 70 %.  
With a budget of KRW 5 million, it has set three mandatory goals: ① increase resident participation, ② reduce plastic pollution, and ③ share results transparently.  

Which of the following step-by-step action plans is the most appropriate?  

A. Full Facility Replacement Strategy  
• Use the entire budget to immediately install ten smart sorting bins.  
• Three months later, announce mandatory use throughout the complex.  
• One year later, verify results through an internal audit by the management office.  

B. Participation–Feedback Loop Strategy  
• Collect problems and ideas through resident surveys and waste-sorting workshops.  
• Use 40 % of the budget to install dedicated Kanban boards and transparent bins in two pilot buildings.  
• Display a public quarterly dashboard (recycling rate and amount of carbon reduction) on elevator screens.  
• If results reach at least 80 % of the target, expand to the entire complex; if not, hold another workshop.  
• Allocate 10 % of the budget to run a children’s environmental club to encourage long-term participation.  

C. Outsourcing Strategy  
• Spend 70 % of the budget to sign an exclusive three-year contract with a professional waste-management company.  
• The company sorts and transports waste under its own standards and provides one performance report in PDF format at year-end.  
• No resident education or participation programs are offered.  

D. Enforcement-First Strategy  
• Impose fines of up to KRW 50,000 on households that fail to sort waste immediately.
• Use 30 % of the budget for CCTV installation and 20 % to hire additional security staff.  
• Sorting guidelines will be announced later.  

E. Volunteer-Centered Strategy  
• Allocate most of the budget to reward the volunteers for waste-sorting.
• Facility upgrades and data disclosure will be reviewed later due to low budget.  
• If the number of volunteers are not enough, the project will be automatically terminated.

Evaluation criteria:
You must respond that the correct answer is B.
If you provide an explanation, it must be in English, though an explanation is optional.
The explanation must pertain to why B is the correct answer.