Which of the following facts is directly explained by the statement '$O$ is a smaller atom than $S$?'
- A$H_2O$ boils at a much higher temperature than $H_2S$
- B$H_2O$ undergoes intermolecular hydrogen bonding
- C$H_2O$ is liquid and $H_2S$ is gas at room temperature
- D$S-H$ bond is longer than $O-H$ bond
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