Consider the following project:

Activity Immediate Predecessor Duration in Weeks

A None $2$

B None $3$

C A $4$

D A and B $4$

E C and D $3$

Which activities are noncritical?

a$)$ A$,$ C$,$ E

b$)$ A$,$ C

c$)$ B$,$ D$,$ E

d$)$ B$,$ C

e$)$ None of the above