A small tech company has recently experienced an unexpected increase in employee turnover. The leadership team wants to understand the specific reasons for this trend. They are considering two methods to measure job satisfaction:

1. A single, company-wide poll asking: 'On a scale of 1-10, how satisfied are you with your job?'
2. An anonymous, multi-question survey that includes sections on compensation, work-life balance, management effectiveness, and career development opportunities.

Which of these two methods would be more effective for diagnosing the root cause of the company's turnover problem? Justify your answer by comparing the type of information each method would provide.