Which molecule has the shortest bond between carbon atoms?

A.     \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}}\)

B.     \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{4}}}\)

C.     \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{2}}}\)

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

C