Which species can oxidize ethanol to ethanoic acid?

A.     \({{\text{I}}^ - }\)

B.     Fe

C.     \({{\text{O}}^{2 - }}\)

D.     Acidified \({{\text{K}}_{\text{2}}}{\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}\)

D