The Overall Project Is Considered to Be the First Level

Multiple Choice

The overall project is considered to be the first level of the WBS.All of the following methods can be used to organize the second level of the WBS EXCEPT:​ 

A)  Organized by project phase. 
B)  Organized by design components / deliverables. 
C)  Organized by work function./ subproject 
D)  Organized by activities and tasks