The best statement that describes what happens during hydrogen bonding, particularly in the context of hydrochloric acid (HCl) as an example, is:
B. The partial positive hydrogen atom in one molecule and a partial negative atom in another molecule experience attraction.
In hydrogen bonding, the hydrogen atom typically becomes partially positive due to its bond with a highly electronegative atom (like chlorine in HCl), and it is attracted to the partial negative charge of another electronegative atom in a different molecule.