The variation of the boiling points of the hydrogen halides is in the order $\mathrm{HF}>\mathrm{HI}>\mathrm{HBr}>\mathrm{HCl}$.
What explains the higher boiling point of hydrogen fluoride?

• A

  There is strong hydrogen bonding between HF molecules.

• B

  The bond energy of HF molecules is greater than in other hydrogen halides.

• C

  The effect of nuclear shielding is much reduced in fluorine which polarises the HF molecule.

• D

  The electronegativity of fluorine is much higher than for other elements in the group.