Acetic Acid Has a Heat of Fusion of 10

Acetic acid has a heat of fusion of 10.8 kJ/mol and a heat of vaporization of 24.3 kJ/mol. What is the expected value for the heat of sublimation of acetic acid

A) 35.1 kJ/mol
B) -13.5 kJ/mol
C) +13.5 kJ/mol
D) -35.1 kJ/mol
E) Not enough information is given to answer the question.