题目内容：
Precedence Diagramming Method(PDM)is a method used in activity sequencin9．There are four types of dependencies or precedence relationships in PDM．The initiation of the successor activity depends upon the completion of the predecessor activity is called __________ ．
A．
Finisto—Start B． Finisto—Finish
C． StartStart
D． StartFinish
参考答案：
答案解析：