Of an Unknown Compound Containing Only Carbon and Hydrogen, 0

Of an unknown compound containing only carbon and hydrogen, 0.123 moles of the compound was found to stoichiometrically react with 0.123 moles of hydrogen gas.Based on these data, we know that the unknown compound must be

A) an alkane.
B) an alkene.
C) an alkyne.
D) either an alkane or an alkene.
E) either an alkene or an alkyne.