使用SQLite数据库的事务操作，编写一段模拟银行转账的逻辑代码
What activities are involved in the customer development model?
A. Customer discovery
B. Customer validation
Customer creation
D. Company building
E. All of the above
What should you NOT do during the customer discovery phase of customer development?
A. Get out of the building to meet with customers
B. Observe the customers to determine their pain or problem
C. Show the customers a prototype of your new product
D. Ask customers questions to better understand their pain
E. Listening with your eyes
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