What Would Be the Effect on the ¹H

What would be the effect on the ¹H NMR spectrum of adding a drop of D₂O to a sample of the molecule shown here?

A) Adding the D₂O will cause more hydrogen bonding and will change the chemical shift of the hydroxyl proton.
B) Adding the D₂O will cause less hydrogen bonding and will change the chemical shift of the hydroxyl proton.
C) A new signal for D₂O will appear in the ¹H NMR spectrum.
D) A deuterium atom will exchange for the hydroxyl proton and the signal in the ¹H NMR spectrum will disappear.
E) Adding D₂O will have no effect on the ¹H NMR spectrum.