Why Does the Melting Point of Hydrocarbons Increase as the Number

Why does the melting point of hydrocarbons increase as the number of carbon atoms per molecule increases?

A) An increase in the number of carbon atoms per molecules also means an increase in the density of the hydrocarbon.
B) because of greater induced dipole-induced dipole molecular attractions
C) Larger hydrocarbon chains tend to be branched.
D) The molecular mass also increases.