Arrange the Following Compounds in Order of Increasing Boiling Point

Multiple Choice

Arrange the following compounds in order of increasing boiling point:
I) 1-propanol, CH₃CH₂CH₂OH;
II) 1,2-propanediol, CH₃CH(OH) CH₂OH;
III) 1,2,3-propanetriol, (glycerol) , HOCH₂CH(OH) CH₂OH.

A) II, III, I
B) I, II, III
C) III, I, II
D) III, II, I
E) I, III, II