The activities and their durations for a software project are listed in the table below.

Activity

Immediate Predecessor

Expected Duration

$($weeks$)$

A

$-$

$5$

B

$-$

$5$

C

$-$

$4$

D

A

$6$

E

B

$9$

F

D$,$ E

$2$

G

F

$3$

H

C

$6$

I

H

$1$

J

G

$3$

K

I

$1$

This project has been previously promised to be completed in $18$ weeks. Regular employees working their regular Monday through Friday schedules are assigned to this project.

Which of the five charts below is the correct PERT chart $($as an A$-$O$-$N network diagram$)$ for this project?

a$.$

A:

b$.$

B:

c$.$

C:

d$.$

D:

e$.$

E: