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? $$\begin{array} { | l | l | l | } \hline \text { Activity } & \text { Time } & \text { Predecessar } \\\hline \text { A } & 5 & - - \\\hline B & 7 & - - \\\hline \mathrm { C } & 8 & \mathrm {~A} \\\hline \mathrm { D } & 7 & \mathrm {~A} \\\hline \mathrm { E } & 4 & \mathrm {~B} \\\hline \mathrm { F } & \mathrm { 8 } & \mathrm { C } , \mathrm { D } \\\hline \mathrm { G } & \mathrm {9 } & \mathrm { E } , \mathrm { F } \\\hline \mathrm { H } & 7 & \mathrm { G } \\\hline\end{array}$$

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