Activity Predecessor Duration

A $-6$

B A $11$

C A $7$

D B$,$C $3$

E D $2$

Critical Path: Calculate the early start, early finish, late start and late finish dates for all activities by performing a forward and backward pass analysis through the schedule network. The convention for the project starts on day $0.$ What is the total float for Activity D$?$

a$.$

$0$

b$.$

$2$

c$.$

$5$

d$.$

$1$