Which of the following is the correct order of negative values of $E^o\,M^{2+} | M$ for the elements $Cr, Mn, Fe,$ and $Co$?
- A$Cr > Mn > Fe > Co$
- B$Mn > Cr > Fe > Co$
- C$Cr > Fe > Mn > Co$
- D$Fe > Mn > Cr > Co$
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