Each of the Following Substances Is a Liquid at -50 ^$\circ$

Multiple Choice

Each of the following substances is a liquid at -50 ^$\circ$ C. Place these liquids in order of increasing vapor pressure: dimethyl ether (CH₃OCH₃) , propane (C₃H₈) , and ethanol (CH₃CH₂OH) _.

A) ethanol < propane < dimethyl ether
B) ethanol < dimethyl ether < propane
C) propane < dimethyl ether < ethanol
D) dimethyl ether < ethanol < propane
E) propane < ethanol < dimethyl ether