Compared to other main group hydrides, such as CH4, NH3, H2S and HF, water is unique because it is a liquid at room temperature. The most likely explanation for this is that:

Water is more plentiful than any of these other compounds.

Water contains oxygen and since oxygen has a high boiling point, so should water.

Water's structure allows for the formation of multiple hydrogen bonds with other molecules, including itself.

Water is able to dissolve nonpolar gases like oxygen and carbon dioxide.

Question

Compared to other main group hydrides, such as CH4, NH3, H2S and HF, water is unique because it is a liquid at room temperature. The most likely explanation for this is that:
		
Water is more plentiful than any of these other compounds.
		
Water contains oxygen and since oxygen has a high boiling point, so should water.
		
Water's structure allows for the formation of multiple hydrogen bonds with other molecules, including itself.
		
Water is able to dissolve nonpolar gases like oxygen and carbon dioxide.