The Vapor Pressure of Ethyl Ether Is 7

The vapor pressure of ethyl ether is 7.87 in.Hg at 2 °C;11.8 in.Hg at 12 °C;27.5 in.Hg at 32 °C;29.9 in.Hg at 35 °C;39.3 in.Hg at 42 °C.What is the normal boiling point of ethyl ether?

A) 2 °C
B) 12 °C
C) 32 °C
D) 35 °C
E) 42 °C