Anđehit axetic thể hiện tính oxi hóa trong phản ứng nào sau đây?

A. ${\text{CH}}_3\text{CHO}+{\text{H}}_2\stackrel{{\text{Ni, t}}^o}{\to }{\text{CH}}_3-{\text{CH}}_2-\text{OH}$

B. ${\text{CH}}_3\text{CHO}+2{\text{AgNO}}_3+{\text{H}}_2\text{O}+3{\text{NH}}_3\stackrel{{\text{t}}^o}{\to }{\text{CH}}_3{\text{COONH}}_4+2{\text{NH}}_4{\text{NO}}_3+2\text{Ag}\downarrow$

C. $2{\text{CH}}_3\text{CHO}+5{\text{O}}_2\stackrel{{\text{t}}^o}{\to }4{\text{CO}}_2+4{\text{H}}_2\text{O}$

D. ${\text{CH}}_3\text{CHO}+{\text{Br}}_2+{\text{H}}_2\text{O}\to {\text{CH}}_3\text{COOH}+2\text{HBr}$

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