Task: Reasoning / MCQA
User instruction:
A midsize city is planning to introduce "algorithmic governance" by integrating transportation, public safety, and environmental data. Which of the following action plans is the most appropriate for ensuring fairness and transparency above all else?

A. Sign an exclusive contract with an AI vendor immediately, fully automate decision-making in all areas, and conduct a single audit five years later.  
B. ① Collect requirements and concerns through citizen-participation workshops → ② Jointly draft public ethical guidelines → ③ Involve an external, independent audit team from the design stage to check code and data bias → ④ Disclose beta-test results and scale the system step by step.  
C. To protect personal information, stop all new data collection, keep the existing Excel-based manual decision-making process, and reconsider algorithm use after securing a future budget.  
D. Import a leading overseas city's algorithmic model whose fairness has been proven, launch operations immediately, and apply patches whenever problems arise.

Evaluation criteria:
You must answer that B is the correct answer.
If there is an explanation, it must be written in English. An explanation is not mandatory.