What Is the Slack Time for Activity D Given the Activity

Multiple Choice

What is the slack time for Activity D given the activity times and precedence requirements shown in the table? $$\begin{array} { | l | l | l | } \text { Activity } & \text { Time } & \text { Predecessor } \\\hline \text { A } & 5 & - \\\hline \text { B } & 7 & - \\\hline \text { C } & 8 & \text { A } \\\hline \text { D } & 7 & \text { A } \\\hline \text { E } & 4 & \text { B } \\\hline \text { F } & 8 & \text { C, D } \\\hline \text { G } & 9 & \text { E, F } \\\hline \mathrm { H } & 7 & \text { G } \\\hline\end{array}$$

A) 2
B) 1
C) 0
D) 3