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