Why is the melting point of toluene only -95°C, whereas that of benzene is 5°C?

Why is the melting point of toluene only -95°C, whereas that of benzene is 5°C? A.) because less energy is needed to melt solid benzene than to melt solid toluene B.) because toluene molecules pack together more efficiently than benzene molecules. C.) because benzene is a highly symmetrical planar molecule D.) because the intermolecular forces that depend on close contact are stronger in solid toluene than in solid benzene