（） from one phase are usually reviewed for completeness and accuracy and approved before work starts on the next phase.

该题的关键词为"from one phase. reviewed. the next phase"，其语句结构为" （）fromone phase（主语）are usually reviewed（谓语）for completeness and accuracy and approved before work starts on the next phase"，含义为"在开始下阶段之前，需要评审前阶段什么的完整性和准确性"，结合选项分析，容易排除A和B，选项C过于笼统，因而选择选项D。