PDM includes four types of dependencies or precedence relationships:（）.The completion ofthe successor activity depends upon the initiation of the predecessor activity.
- AFinish-to-Start
- BFinish-to-Finish
- CStart-to-Start
- DStart-to-Finish
问题
PDM includes four types of dependenci
参考解析：
该题的关键词为"PDM includes four types"，其语句结构为"The completion of the successor activity（主语）depends upon（谓语）the initiation of the predecessor activity"，含义为"后续活动的完成依赖于前置活动的开始"，根据选项容易识别为SF活动依赖类型。
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