Which two reagents react with each other in a redox reaction?
- A$\text{CH}_3\text{CHCH}_2 + \text{Br}_2$
- B$\text{CH}_3\text{CH}_2\text{CH}_2\text{OH} + \text{concentrated } \text{H}_3\text{PO}_4$
- C$\text{CH}_3\text{COCH}_3 + \text{HCN}$
- D$\text{HCO}_2\text{C}_2\text{H}_5 + \text{dilute } \text{H}_2\text{SO}_4$