The Cost Effectiveness Ratio for the Current Level of the Activity

The cost effectiveness ratio for the current level of the activity below is


$\begin{array}{|l|c|c|}\hline & \text { Total Avoided Infections } & \text { Total Cost } \\\hline \text { Minimal } & 1,00025 \% & \$ 20,00020 \% 1.25 \\\hline \text { Reduced } & 2,00050 \%+25 \% & \$ 45,00045 \%+25 \% 1.00 \\\hline \text { Current } & 4,000100 \%+50 \% & \$ 100,000100 \%+55 \% 0.91 \\\hline \text { Expanded } & 8,000200 \%+100 \% & \$ 250,000250 \%+150 \% 0.67 \\\hline\end{array}$

A) 1.25
B) 1.00
C) 0.91
D) 0.67
E) 0.40