Table $7\mathrm{.}4$

$\backslash$table$[[$Activity$,$Predecessor,Time$($weeks$)],[$A$,--,8],[$B$,$A$,6],[$C$,--,4],[$D$,$C$,9],[$E$,$A$,11],[$F$,$B$,3],[$G$,$D$,$ E$,$ F$,1]]$

Using Table $7\mathrm{.}4,$ what is the early start time for activity D$?$

week $7$

week $9$

week $4$

week $0$