单项选择题
Aworkbreakdownstructure(WBS)isatoolusedtodefineandgroupaproject’sdiscreteworkelementsinawaythathelpsorganizeanddefinethetotalworkscopeoftheproject.AWBSismostusefulfor______.
A．identifyingindividualtasksforaproject
B．schedulingthestartoftasks
C．schedulingtheendoftasks
D．determiningpotentialdelays