Cho sơ đồ chuyển hoá sau: CH3CHOHCOONa → B → C → D → B Cho biết: B, C, D

A. ${\mathrm{CH}}_4, {\mathrm{C}}_2{\mathrm{H}}_2, {\mathrm{CH}}_3\mathrm{COONa}$

B. ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}, {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Cl}, {\mathrm{C}}_2{\mathrm{H}}_4$

C. ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Cl}, {\mathrm{C}}_2{\mathrm{H}}_4, {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$

D. ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Cl}, {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}, {\mathrm{C}}_2{\mathrm{H}}_4$