A Project Is Represented by the Activity Durations (In Days,estimated

A project is represented by the activity durations (in days,estimated at 90% likelihood of completion) and precedence requirements shown in the table.What is the length of a feeder buffer if this project is managed using critical chain methodology? $$\begin{array} { | l | l | l | l | l | l } \hline \text { Activity } & \text { Predecessor } & \text { Lengenth } & \text { Activity } & \text { Predecessor } & \text { Length } \\\hline \text { A } & - - & 18 & \mathrm { E} & \mathrm { C }, \mathrm { D} & 13 \\\hline B & - & 16 & \mathrm { F} & \mathrm { C }& 9 \\\hline \mathrm { C } & \mathrm { A } & 22 & \mathrm {G} & \mathrm { E } , \mathrm { F } & 15 \\\hline \mathrm { D } & \mathrm { B } & 14 & & & \\\hline\end{array}$$

A) 4 days
B) 3 days
C) 2 days
D) 1 days