The Project Described in the Table Uses the Same Resource

The project described in the table uses the same resource for activities A,B,C,and D.Which activity gets first use of this resource if we assign the resource based on the activity with the smallest amount of slack? $$\begin{array} { | l | l | l | l | } \hline \text { Dctivity } & \text { Duration } & \text { Predecesser } & \text { WBS ID } \\\hline \text { W } & 4 & - - & 12 \\\hline \text { A } & 3 & \text { W } & 16 \\\hline B & 4 & \text { W } & 15 \\\hline \mathrm { C } & 5 & \text { W } & 13 \\\hline \mathrm { D } & 6 & \text { W } & 14 \\\hline \mathrm { E } & 1 & \mathrm {~B} & 17 \\\hline \mathrm { Z } & 1 & \mathrm {~A} , \mathrm { E } , \mathrm { C } , \mathrm { D } & 18 \\\hline\end{array}$$

A) Activity A
B) Activity B
C) Activity C
D) Activity D