Question

The reason H2S exists as a gas while H2O exists as a liquid at room temperature is because:

H2S has more electrons than H2O, causing a larger dispersion.
H2O has a lower boiling point than H2S.
H2S possesses hydrogen bonds, while H2O only possesses London dispersion forces.
H2O possesses hydrogen bonding, while H2S does not.

Answer 1

The reason H2S exists as a gas while H2O exists as a liquid at room temperature is because H2O possesses hydrogen bonding, while H2S does not.
I'd say that the last option is correct.