For the Oxides CrO,Cr₂O₃,and CrO₃,which of the Following Is True

Multiple Choice

For the oxides CrO,Cr₂O₃,and CrO₃,which of the following is true?

A) All the oxides are basic.
B) All the oxides are acidic.
C) CrO is acidic,and Cr₂O₃ and CrO₃ are basic.
D) CrO and Cr₂O₃ are acidic and CrO₃ is basic.
E) CrO is basic,Cr₂O₃ is amphoteric,and CrO₃ is acidic.