The boiling point was measured for some simple alcohols. The table shows the results of an investigation. What can be concluded about the alcohols based on the table?

The boiling point increases as the number of carbon (C) atoms increases.

The number of hydroxyl (OH) groups increases as the boiling point increases.

Larger molecules tend to have lower boiling points than smaller molecules.

Each additional pair of hydrogen (H) atoms increases the boiling point of the alcohol by 21°C.​