单项选择题

(7) 是软件生存期中的一系列相关软件工程活动的集合，它由软件规格说明、软件设计与开发、软件确认、软件改进等活动组成。 (8) 上是以追求更高的效益和效率为目标的持续性活动。

文中（7）处应为（）。

A．软件过程
B．软件工具
C．质量保证
D．软件工程

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