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,$6]]$

What is the critical length?

Keep your own AOA graph.

Select one:

a$.23$ days

b$.25$ days

c$.27$ days

d$.28$ days

e$.20$ days