Which compound has the empirical formula with the largest mass?

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.     ${{\text{C}}_{\text{3}}}{{\text{H}}_{\text{6}}}$

A