AOA refers to _____________.

A.
Arrow Diagramming Method [ADM]

B.
Precedence Diagramming Method [PDM]

C.
Fragment Network

D.
None

Explanation:
PDM is also known as Activity On Nodes (AON). Arrow Diagramming Method (ADM) uses arrows as activities, and nodes are used to connect and show dependencies. In other words, the lines in between nodes are where you place the task name. Thus this method is also called Activity On Arrows (AOA).