Which of the Following Statements Best Explains the Observation That

Which of the following statements best explains the observation that HF has the highest boiling point of all the hydrogen halides?

A) The fluorine in HF is the smallest atom for all of the halogens
B) Fluorine is the most electronegative of the atoms
C) HF can participate in hydrogen bonding
D) HF is very reactive and can react and dissolve glass
E) HF is a weak acid, and doesn't completely dissociate