Given the following reactions
Fe₂O₃ (s) + 3CO (g) → 2Fe (s) + 3CO₂ (g) ΔΗ = -28.0 kJ
3Fe (s) + 4CO₂ (g) → 4CO (g) + Fe₃O₄(s) ΔΗ = +12.5 kJ
the enthalpy of the reaction shown below
3Fe₂O₃ (s) + CO (g) → CO₂ (g) + 2Fe₃O₄ (s)
is _____ kJ.

A. +109
B. 40.5
C. -59.0
D. -109
E. -15.5