A Simple Project Listing of Five Activities and Their Respective

A simple project listing of five activities and their respective time estimates are presented below: $\begin{array}{|l|l|l|}\hline \text { Activity } & \text { Immediate Predecessor } & \text { Time in Days } \\\hline \text { A } & \text { None } & 1 \\\hline \text { B } & \text { A } & 2 \\\hline \text { C } & \text { A } & 1 \\\hline \text { D } & \text { B and C } & 3 \\\hline \text { E } & \text { D } & 2 \\\hline\end{array}$
Using the Single Time Estimate CPM procedure,which activities make up the critical path?

A) A,C,D,E
B) A,B,D,E
C) A,C,B,D,E
D) A,D,E
E) None of the above