What does the speaker identify as having helped his project?
A．Previous experience
B．Input from end users
C．Experienced technical support staff
D．Researching the problem before starting

A.Previous
B.Input
C.Experienced
D.Researching

【参考答案】

B
解析：所给的文段中说话人提到说，如果要更换文件编排系统，需要考虑的重要的因素就是管理部门的支持和实际使用者的意见。