What causes water to have relatively high boiling point

A) Hydrogen bonds between water molecules
B) Hydrogen bonds between hydrogen and oxygen within water molecules
C) Cohesion between water molecules and the container in which the water is boiled
D) Covalent bonds between hydrogen and oxygen within water molecules

B) Hydrogen bonds between hydrogen and oxygen within water molecules

I don't have a clue other than God made it that way.

Another question is "why does water get heavier just before it freezes then get lighter and float (ice)".

If water did what everything else in the Universe does and get heavier when they turn to solid, there would be no life on Earth or anywhere.

B

This is in chemistry broth