The Vapor Pressure of a Chlorofluorocarbon (CFC)is 0

The vapor pressure of a chlorofluorocarbon (CFC) is 0.193 psi at -98 °C;1.91 psi at -70 °C;14.7 psi at -30 °C;29.4 psi at -12 °C;73.5 psi at 16 °C.What is the normal boiling point of the CFC?

A) -98 °C
B) -69 °C
C) -30 °C
D) -12 °C
E) 16 °C