Two Critical Path Activities Are Candidates for Crashing on a CPM

Multiple Choice

Two critical path activities are candidates for crashing on a CPM network. Activity details are in the table below. To cut one day from the project's duration, activity ________ should be crashed first, adding ________ to project cost. $$\begin{array} { | c | c | c | c | c | } \hline \text { Activity } & \text { Normal Time } & \text { Normal Cost } & \text { Crash Time } & \text { Crash Cost } \\\hline \text { One } & 8 \text { days } & \$ 6,000 & 6 \text { days } & \$ 6,800 \\\hline \text { Two } & 10 \text { days } & \$ 4,000 & 9 \text { days } & \$ 5,000 \\\hline\end{array}$$

A) One; $400
B) One; $6,800
C) Two; $1,000
D) Two; $5,000
E) One or two should be crashed; $1,400