Given the following small project for an AOA network,

$\backslash$table$[[$Activity$,$Immediate Predecessor$($s$),$Time Duration $($days$)],[$A$,$D$,$ E$,10],[$B$,$A$,9],[$C$,$A$,4],[$D$,$None,$8],[$E$,$None,$6]]$

How many nodes are there?

Keep your own AOA graph.

Select one:

a$.6$ nodes

b$.4$ nodes

c$.5$ nodes

d$.7$ nodes

e$.8$ nodes