Which compound could be X in the two-stage reaction pathway?

${{\text{C}}_{\text{2}}}{{\text{H}}_{\text{4}}} \to$ X $\to {{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}$

A.     ${{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}}$

B.     ${{\text{C}}_{\text{2}}}{{\text{H}}_{\text{3}}}{\text{OH}}$

C.     ${{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{Br}}$

D.     ${{\text{C}}_{\text{2}}}{{\text{H}}_{\text{4}}}{\text{C}}{{\text{l}}_{\text{2}}}$

C