What Is the Early Finish Time for Activity F Given

Multiple Choice

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

A) 15
B) 17
C) 19
D) 21