What Is the Early Start Time for Activity G Given

Multiple Choice

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

A) 22
B) 21
C) 20
D) 19