Standard reduction electrode potentials of three metals $A$,$B$,and $C$ are respectively $+0.5 \ V$,$-3.0 \ V$,and $-1.2 \ V$. The reducing powers of these metals are
- A$B > C > A$
- B$A > B > C$
- C$C > B > A$
- D$A > C > B$
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