题目内容
（请给出正确答案）
[主观题]
Which of the following statement is correct？（) A．The definition phases results in the Software R
Which of the following statement is correct？( )
A．The definition phases results in the Software Requirements Specification
B．Testing is optional in software life cycle
C．CASE tools can only aid in the design phase of a software lifecycle
D．A change during a later phase does not require the documentation of all Earlier phases to be updated
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