Syringes are used to bring drops of H2O and ethanol (EtOH) to the top of columns of mercury (Hg), as shown below. Identical volumes of the two liquids are added. What will happen to the heights of the Hg columns after a short time has passed?

• Both column heights will be the same.

• The column below H2O will be shorter.

• The column below EtOH will be shorter.

• It is impossible to tell without knowing the temperature.