The Combustion of Butane Produces Heat According to the Equation $\rarr$

The combustion of butane produces heat according to the equation 2C₄H₁₀(g) + 13O₂(g) $\rarr$ 8CO₂(g) + 10H₂O(l) $\Delta$ H°_rxn = -5,314 kJ/mol
What is the heat of combustion per gram of butane?

A) -32.5 kJ/g
B) -45.7 kJ/g
C) -91.5 kJ/g
D) -2,656 kJ/g
E) -15,440 kJ/g