Using the Data Supplied in the Following Table, by How

Using the data supplied in the following table, by how many weeks can we crash activity A? $$\begin{array} { | c | c | c | c | c | c | c | } \hline \text { Activity } & \begin{array} { c } \text { Normal } \\\text { Time }\end{array} & \begin{array} { c } \text { Crash } \\\text { Time }\end{array} & \begin{array} { c } \text { Normal } \\\text { Cost }\end{array} & \begin{array} { c } \text { Crash } \\\text { Cost }\end{array} & \begin{array} { c } \text { Availab le } \\\text { Weeks of } \\\text { Crashing }\end{array} & \begin{array} { c } \text { Crashing } \\\text { Cost/Week }\end{array} \\\hline \text { A } & 4 & 2 & \$ 15,000 & \$ 21,000 & & \\\hline \text { B } & 3 & 2 & \$ 15,000 & \$ 18,000 & & \\\hline \text { C } & 4 & 4 & \$ 9,000 & \$ 9,000 & & \\\hline \mathrm { D } & 5 & 3 & \$ 10,000 & \$ 16,000 & & \\\hline E & 4 & 1 & \$ 10,000 & \$ 13,000 & & \\\hline \text { F } & 1 & 1 & \$ 10,000 & \$ 10,000 & & \\\hline\end{array}$$

A) 0
B) 6
C) 1
D) 2