Which phase of the software development requires the most development time?
Which phase of the software development requires the most development time?
A．the design phase
B．the testing phase
C．the maintenance phase
D．the development phase
正确答案：C
词条内容仅供参考，如果您需要解决具体问题
（尤其在法律、医学等领域），建议您咨询相关领域专业人士。