Which of the following reaction(s) take place in Bessemer converter for the extraction of Cu?
A. `2CuFeS_(2) + 4O_(2) rarr Cu_(2)S + 2FeO + 3SO_(2)`
B. `Cu_(2)S + (3)/(2) O_(2) rarr Cu_(2)O + SO_(2)`
C. `Cu_(2)S + 2Cu_(2)O rarr 6 Cu + SO_(2)`
D. `FeO + SiO_(2) rarr FeSiO_(3)`
